I was thinking, there are so many games that I loved when i was a kid that are no longer around, worse, the genre isn't even being produced. Most of these genre's are also, sadly escaping. If I was king of the world, here is how I would make them comeback:
Space Ship Flight Sim: Wing Commander - this series was awesome, and now there is nothing like that out there that I can think of. I would port these to Xbox live, or make a new one. The new consoles have analog controls and more than enough buttons to swtich shields and weapons. That would be awesome. A new Rogue Squadron would be cool too, that was just about the only reason to own a gamecube. Heck I might throw mine in my Wii just to revisit it this weekend.
Point and click adventure: I keep thinking these old point and click adventure games would be PERFECT for the iOS, android platforms. I had hope that more of these would come back after Myst was released, but, sadly they have yet to come back. I would LOVE a Sam and Max on the iPad, and Kings Quest would be great