Some may call this post ironic as I am going to talk about why I feel this move to touch interfaces on Deskops is before its time while I write this on an touch enabled device.
Desktop touch solutions are not as common as mobile solutions aside from all in one devices. Currently you can expect to pay close to $600-$1000 for a good 20″ Touch enabled All-in-one, this cost is hard to justify as you could easily buy a higher resolution monitor for a fraction of the cost and upgrade an existing computer.
Yet this seems to not matter as Popular Linux distributions, Apple and even Microsoft are starting to move in this direction. Apple had ben toying with the idea of replacing OS X with IOS as a desktop OS.
Now I am not against change, in fact I welcome it. However, when an company decides to force the use of a specific type of device to get the intended user experience, one begins to question the purpose of this. Cannonical has improved Unity a great deal, but the experience with a keyboard and mouse is not as rohbust as with a touchscreen.
Only time will tell what the consumer thinks, I will try my best to stay open about it.