Nope. Civ 5 will be much different. This game is being designed for a different audience and seems to have a different experience. But they might take some of the advanced graphical concepts into the new game.
I have my own theory about how Civ Revolutions could help Civ 5, though...
Firaxis is trying to be careful not to get much more complex than Civ 3 or Civ 4, in order to remain viable with mainstream customers. The transition from Civ 3 to Civ 4 meant simplifying a few concepts in Civ 3 in order to make room for new concepts in Civ 4. They replaced pollution with health, which took less time to manage. They gutted espionage (until the XP, which is targeted at more hardcore fans), but made government into a more complex civics system. They reduced opportunities for tile-juggling, but made room for specialist-juggling.
I'm working under the assumption that Civilization 5 will NOT be any more complex than Civilization 4. (And you should too, if you understand the gaming industry beyond this hardcore community.)
For Civ 4 --> Civ 5, they'll probably do the same thing as Civ 3 --> Civ 4. Take a step back, figure out what was REALLY fun, and cut out what really only added a bit of flavor. Cut some stuff in order to make room for new stuff. (For example: get rid of the probabilities on Great People to reduce micromanagement there, but actually have internal political struggles between Merchants and Priests. Untangle the tech tree into a few flat branches, but let you do more with culture.) That would produce a solid game, I guess.
But my theory, not that they'll listen to me, is that they should build Civilization 5 off of Civilization Revolutions. If the play times are any indicator, it sounds like they cut the game in half -- maybe more! If they start from Civ Rev, they can introduce WAY more new ideas. (Although, obviously, we'd like a few of the old ideas to return as well.)
I think it would be easier to make for a fresher game by wiping the slate half clean with Civ Rev and then filling the rest up with more new ideas. I worry I'd be more bored if they did the "subtract one thing, add one thing" strategy for Civ 5, like they did for Civ 3 to Civ 4.