The TurboGrafx-16 slot and the Game Gear thing really makes me want the Retro Freak more. But that price, yikes.
BTW, Gamester81 did a video review on this, and even though it claims it will play both U.S. and Japanese NES/Famicom games, the slot is too big for NES and won't play them, maybe via ROMs, but not with a cartridge.