I'll throw some oil on the fire. How about this:
5e, whenever it comes and whatever it is called, will not look anything like 3x, 2e or 0d&d. Old skool gamerz will continue to be bitterly disappointed.
With every edition there's a contingent hoping that the next one will be a return to whatever version is their favorite. But that's never happened. And it's not going to happen in the future.
Those old editions have been done. They are still being done. You have Pathfinder and retro clones and yes, your dogeared copies of the actual game.
But while releasing, let's say, the Uber Ultimate Edition of classic AD&D might garner a temporary wave of enthusiasm in the community, it's a dead-end. Once everyone who is 30+ had finished hailing D&D's return to its roots, they'd go back to raising their kids and working at their office jobs. Sales would slump as the younger gamers who actually drive them completely failed to connect with the older style of game.
Eventually D&D enthusiasts would become like model train builders - a rapidly graying group whose hobby is unlikely to be transferred to a new generation.
Model trains are kinda cool, but I don't really want to spend Saturday afternoon working on one in the basement with grandpa, you know?
D&D has to move forward and connect with new players. Its design needs to reflect what the kids are familiar with. 4e brought in a lot of CCG design and codified concepts that are familiar from MMOs. That wasn't an accident. 3e I think reflected the rise of cRPGs with their demand for more consistent rules and mechanics.
5e will also borrow from whatever the kids are playing. It will be yet another evolutionary step forward. I have no doubt that it will alienate a lot of 4e players and leave them pining for 6e, which they are sure will represent the triumphant return of whatever it is they liked about 4e (it won't). But 5e will be different, as different from 4e as 4e was from 3e, and it will make a lot of us feel old.
My point, I guess, is that people shouldn't be too quick to call for a new edition of the game. New editions are extremely unlikely to fix whatever you personally feel is wrong with the game or restore it to the style that you and your friends spent so many hours playing. And they're very likely to change things up, skewer the sacred cows, and generally make you feel like the new edition isn't what YOU would call D&D.
As 4e appears to be likely to remain with us in 2011, this might be a good time to take a deep breath and appreciate the classic elements that remain in this edition. After all, Fourth Edition still involves rolling dice, requires a DM, and can be played without the aid of a computer.
The next edition might not.
OK, I'm going to go hide under my desk and wait for people to start throwing rocks.