Funny, I was thinking about that not too long ago.
Hypothetically we'd have to be able to map 3D games with ease, and to map them faster than more games can be made, but I don't think that's feasible.
I don't know that there's enough interest to map every 2D game that ever existed. It would be tough to even say we did, especially for the PC when it's hard to track releases.
But, say I put pressure on people to map all the really popular 2D games at the very least. The site would be more popular because it would be a great resource, but without much that's new, people might not ever come back again if they get in the habit of saving all the maps they need or like. Hopefully I won't have to shut the site down due to perceived lack of interest.
I suppose after all the popular games are mapped, we could go back and reamp them for consistency, like what Revned did for all the NES Mega Man games. Then the forums would just turn into a big OCD flame war when people threaten to replace others' maps just because their palettes are different or because they don't like how others worded some strategies that they decided to include.
Realistically, it's a long way to that point (at least without the aid of quantum computers). Some big series *coughFinalFantasycough* and genres *cough16-bitRPGs* are hardly represented at all on this site. Tackling those would ensure new content for a long time, assuming they haven't already been totally mapped by teams of zealous fans who haven't yet contributed them to VGMaps.com for whatever bizarre reason. :p
On a semi-related note, once I looked at how many arcade games were playable in MAME32 and calculated that if I played one game a day, I'd be well into my forties when I finish, but that's assuming they never add compatibility for more games. Maybe not the best example as arcade games are notorious for being clones of each other... But anyway, my point is that there are likely more games now than can be seriously played in a human lifespan, and how much more time does it take to map these games? You wouldn't leave it to one person, but instead of talking about man-hours, you may be talking about "man-lifetimes"!
