I think you are misunderstanding my post: I never claim that providing the emulator legally makes ROM downloads legal too.
What I gathered from your post is that making an emulator, on its own, is legal. It is. My point is that along with the peanut butter comes the jelly. You can legally make an emulator, but when 99.99999% of all games it will run are copyrighted works, I'm simply saying that one doesn't exist without the other.
I'm for a use it or lose it when it comes to copyright, especially technology. If someone is sitting on some copyrighted game code form 1981 and never intends to do anything with it ever again, when new technology comes around that make the old new again, if they don't want to take advantage of it, that's fine, but they should lose any copy protection for new technology they simply want to ignore.
Now, as many have mentioned, Atari, NAMCO, etc. have been good at making this stuff available to next-gen. Imagine an "official NES emulator from NINTENDO. They could start with 1st party titles, then sign some licensing deals and get all the NES games on there. As long as they don't go greedy. I for one would pay $1.00 (for normal games, as and much as $5.00 for hit games on an official NES emulator. I'm just not going to drop $50/game like I did in the 80s (well like my father did).
I know they have that Wii Marketplace thing... but imagine the NES app for Apple TV? Talk about a killer game app. And, all the NES games will work with that rinky dink tv remote Apple demands games support. Talk about a no brainer. How many adults who go back and buy their childhood again? I know I would.