Team Cyclops will work on it if they will have enough people who want this. Please vote http://www.teamcyclops.com/forum/showthread.php?t=10878
Remember to read the further explanation about the heavy limitations on screenshots, including only being able to screenshot the primary display engine, not the secondary (ie, only one screen, not both, and not either or, just the Primary), and there being a limitation to how many can be made, etc. It still would be a nice feature though.
That COULD be cool, but there's no huge benefits to it. Now, have ingame screen RECORDING, and Cyclo could certainly sell some carts to LPers
I'd estimate unplayably. Like I said, recording would be cool, but it's just not doable right now. It's something you'd do in an EMULATOR, not a flashcart.