Don't be too sure of that. If he gets the House back next year, you could be looking at a repealer of the 22nd Amendment so Obama could serve basically for life.
Obama likes to work behind the scenes; he screwed Hillary at the caucuses, so he might try to build on that by calling a constitutional convention to basically rewrite the Constitution -- removing the checks and balances and turning America into a one-party Communist tyranny -- and then use skanky ACORN politicking to get the new constitution "ratified", Obozo's way.
Something like that.