They'll buy the new releases. And as a sample size of 1, I'd probably pay $10-$20 for each classic game if I knew it had indefinite portability. Same way I'm happy to pay for classic books.

I missed Metroid prime when it came out, and there's no real way for me to go back to it without getting my GameCube from my parents and finding a disk on eBay.

Just think of all of the kids who've heard about all of these classic games, love the latest version, and would gladly dive into the rest of the series, if it were available.

People are still getting excited because the source code for a 25 year old game has finally been stolen and leaked. 2401