Using app to play through computers speakers

That would require Sonos speaker software completely written into the application. Don't believe possible or anyone Sonos would think of doing. If you know Sonos architecture you know music is never sent to the controller.

That's why asking to send music to the controller... Another option could be an addon, with a licence provided with a physical device for exemple, who transform a computer into a Sonos device... Both commercial and technical architecture should be preserved by this option...

This is a different concept and has been brought up before. Your not talking playing through controller. Your talking about turning computer into a Sonos unit (software Sonos version on pc). Something like a USB key has been discussed before. I don't think Sonos has any interest in it AT ALL.

A device to transform a computer into a Sonos device? Like a Connect you mean?

Like a Software Connect, yes. The name does'nt matter : Software sonos, Sonos addon, Sonos controller with audio capability...

This in the main problem in Sonos IMHO : they don't care about customers expectations, like HD compatibility, provided by BlueSound for exemple.

Like a Software Connect, yes. The name does'nt matter : Software sonos, Sonos addon, Sonos controller with audio capability...
Err.. There already is a Sonos CONNECT. And, although Sonos haven't totally killed the suggestion, to convert the Desktop Controller into a free Sonos Player would be commercially questionable, to say the least.

This in the main problem in Sonos IMHO : they don't care about customers expectations, like HD compatibility, provided by BlueSound for exemple.
They do, and they care more about delivering something of real value.
http://www.whathifi.com/news/sonos-plans-brighter-and-brighter-wireless-music-future

“We’ve looked really hard at it”, says Tom. “Of course we want to make sure we’re not missing anything and we feel pretty good that we’re not. There are arguments you could make about deeper bit depth, but we are unable to make a meaningful argument on sample rate. We tried, we can’t – the math just isn’t there.”
Giles Martin agrees: “There’s a huge, cheap miscommunication about high-resolution music. "

Improving their product and catering to every whim a customer may have are two different things. Demanding functionality a product never had or even desires to has nothing to do with Sonos not listening to customers.

Customers asked for Amazon Music service on Sonos which I never thought would happen. But it was released by Sonos yesterday having partnered with Amazon to be the first I know of to add that capability. Sounds like listening to customers to me ...the ones using Sonos for what it was designed for not the ones demanding a redesign (unneeded).

Like a Software Connect, yes. The name does'nt matter : Software sonos, Sonos addon, Sonos controller with audio capability...
Err.. There already is a Sonos CONNECT. And, although Sonos haven't totally killed the suggestion, to convert the Desktop Controller into a free Sonos Player would be commercially questionable, to say the least.

Yes, I've a Sonos Connect and 2 play:1... In my configuration, another Sonos connect at the office is not possible, but a free sonos player... This would by commercially acceptable to provide a free licence for software Sonos player with Sonos hardware, don't you think ?

This in the main problem in Sonos IMHO : they don't care about customers expectations, like HD compatibility, provided by BlueSound for exemple.

They do, and they care more about delivering something of real value.
http://www.whathifi.com/news/sonos-plans-brighter-and-brighter-wireless-music-future

There’s a huge, cheap miscommunication about high-resolution music

I agree with this. But with some promotional, I bought HD Flac on Qobuz instead of 16/44.1. And my Sonos can't play them, I'm obliged to convert them. Native HD support could be great.

No a software version (which doesn't exist for pc or Mac) would be a disaster for Sonos as it was with squeezebox. Many a person happily running their software version of squeeze box (soft squeeze) from a now defunct product line (and Dont think for one minute the free software version didn't aid its demise)

Native HD support could be great.
I've lost count of how many times this issue's been covered. Sonos -- justifiably in my view -- can see no reason to support hi-res content. As for downconversion, it's hugely wasteful of bandwidth -- CPU and network -- to convert hi-res files each and every time they're played. Do it once, and store the result in your Sonos library.