Mini keyboards have been a thing for a long time. "Gaming grade wireless" is just advertising lingo BS. The mousepad section of the device is too small for most gaming sessions unless you keep your mouse at a very high sensitivity. Also, when the pad is folded (say you have access to a different mouse surface) the edges aren't flush so you end up with a pivot point being directly underneath WASD keys. I can't imagine that the entire device is very heavy so it probably isn't very well counter weighted to prevent the whole thing from tipping up during intense KPS moments (Starcraft anyone?).
All in all, it looks like another device from razer that's going to be 8/10 form 2/10 function.
However, I will say that Razer is not afraid to try cool new things when it comes to gaming peripherals and I have to commend them for that. It's nice to see a company that's not afraid to make something different to see if it works.