I like this idea as well, it seems fruitful enough that at least one organisation is providing it [0]. I would have thought overheads of getting new devices might cut into revenue though. I'd be interested to see what the difference in experience is for something on an emulated device (with HAXM) and a remote real device though, and if it's substantial enough to be worth paying for.

[0] : http://www.keynote.com/solutions/testing/mobile-testing