I saw stuff like this. This thread is inspired by the RG Nano which is similar-ish to this.Yeah. I think the FunKey is more of novelty item than something practical to play with, but it's pretty cute. Hopefully something better will come along someday.
The RG Nano was meant to be a keychain sized variant on the popular "retro-boy" trend of emulator machines. A noble goal in itself but it has problems. It is clearly designed more to evoke a retro aesthetic over being playable at its size. They went a little too cheap by opting for a 240x240 screen instead of a 320x240 screen.
As one review put it, this is more or less just a keychain sized Pokemon Crystal machine.
Reviews for the Funkey S say it is not well built. A clamshell design seems a little too ambitious.