Re: I'm going against the grain here but -
The quality of relatively static output should be excellent, but I suspect that we're going way beyond laptop/slab "retina" requirements here.
If you want fast updates, you might need a Titan or two. Actually, that might mean that low performance gadgets are the place to put these things - It stops people wanting to play Battlefield 3 on it. You've also got the option of a DP port on your gadget which you could plug into a real monitor and span the graphics system. Just because the chipset supports it, doesn't mean you're going to have a single screen with it - chained displays with DP are also possible.