And if by handy you mean handy for shitposting, then yes.
It's obvious that the Touch Bar has some functionality. Someone already got the original DOOM running in the tiny gap, but it wasn't really "playable".
This, however, is actually useful. Apple said you could rig the Touch Bar up to be used with other applications, and that's what DemiPixel has done - by adding a bunch of shortcuts for talking shit in Rocket League chat, quitting the game, and searching for matches.