If you pick and choose semi carefully.... you can fit most of everything from the 80's up too PS1 and N64 on the Nvidia Shield TV Pro.
For me the money was well worth it, I watch Netflix on the thing and play a crap ton of games
Now back to playing Chrono Trigger on the "SNES"!!!
but yeah I agree, this Mini NES has me interested but only from a collecting stand point, I can play all the NES games and probably with better filtering (I have recently been introduced to the wonders of BRZ, nothing is perfect when it comes to filters but I enjoy the cartoon kind of look that BRZ gives.
Another advantage of emulation is that you can play some of the funnier hacks and mods and translations. Disadvantage? That sweet sweet NES block controller... Although I am not sure I want to hold one ever again... I think my fingers still curve in a bit more than normal from playing NES so much back in the 80's.