I have the same at times when I occasionally undust my NES and play the origional Zelda, Battle of Olympus ar another 8bit game. can't even believe I liked it myself so much. And if I had access to the origionall Phillips computer I owned before that playing space invaders and a game called Froggy I would probably wonder why I even liked it.
Hope I don't need to buy the origionall NES games I used to have again for the Revolution for some strange reason (as I am quit sure the origional disk won't fit).
If I would have kids of my own think they get a Revolution. Although I am in it for the games, and I loved Zelda, although at present just that isn't enought for me to buy a Nintendo system.
mariokart DD
Zelda
Metroid
supersmash brothers melee
4 games that i really liked and i got the older zelda versions of the n64 and the NES on the cube to.
thinking of it.. half my games are nintendo only

and for the playback function they use emulators. (not sure if it works with payment, Nintendo didn't give much away)
and the cubegames can be played by inserting the disks ofcourse.
but still the main reason i like nintendo is because it's the only system with some good funny multiplayer games.
and the games i wanted on singleplayer where on the nintendo or on the PC (except for tekken and grand turismo)
mario party
mario kart
supersmash << played 1000+ hours multiplayer with friends
and more
btw try reconnecting the supernes

even now huge fun
(nes is to slow for me now

)