sirencall :
Also keep in mind there are low profile 7850's and 7870's already open to the market plus with APU sector, it will only get better with each iteration. Its entirely possibly that there may be an A10 crossfired with another card which would put the performance of the richlands possibly in the 7850 range because if I remember from their website is that there is a gpu added in as a modular component that isnt on the CPU segment of the board. Still overpriced for the performance but if factor in mobility and size of the device it gets the laptop mark-up. Now the par that should make this unique, if true, is that it is supposedly going to be able to run multiple instances of a game on multiple screens but again thats a rumor.
A Richland APU even in Crossfire with a similar discrete card will not be anywhere near a Radeon 7850, just saying. Richland is just an improved version of Trinity according to AMD and chances are that it'll only support Crossfire with the same graphics cards as Trinity, aka up to the Radeon 6670. Beating even a Radeon 7770 is unlikely and going on to be anywhere near the Radeon 7850 is pretty much impossible with that hardware. Perhaps some extreme memory and overclocking could do the job, but that wouldn't be done in any pre-built system.
Even if these Xi3 systems have a GPU option that goes for say $100 and it could bring up the performance to say a Radeon 7770, which is still kinda a stretch, it'd be not just a little expensive for say a laptop-mark up, it'd be about double the price of many similarly performing laptops that come with many more features such as built-in display, speakers, web cams (sometimes), keyboard/touchpad, and more. The value would be horrendous.
Being low profile isn't going to stop the fact that those cards are still using around 100W to around 130W of power. That's a lot of heat to dissipate for a very small form factor, especially one that is built to not be loud with fans.
I think that Fulgurant addressed the other details better than I would have, so I'll leave it be
Being able to run multiple instances of games on multiple screens seems interesting, but I don't think that it has the performance to do that very well.