This will have a market if they can balance the cost - I think the big market would be people wanting to play high end games on netbooks or tablets - imagine playing battlefield 3 on max settings on something as thin and light as a samsung series 9 netbook. Or play something better than 'angry birds' on an ipad. This certainly has a future, mostly with wi-fi connected mobile devices that don't have the power to run decent games. It will not replace consoles etc. - at least not for a long time.
Xaiano's comments