I have to admit it: Even though Karl Rove is out of the White House as of the end of this month, I can't help but be somewhat skeptical regarding whether he has been forced out. Rove has demonstrated his political acumen time after time in guiding Bush to the Governorship of Texas, then to the Presidency. Since 2000, Rove has further illustrated his ability to manipulate hearts, minds and the media to keep his clearly-incompetent tool from being blocked by Congress or outright removed from power.
Rove need not have an office in the White House to "advise" the President. Further, there's really nothing I've seen to suggest that Rove will not simply attach himself to some other politician's retinue, eventually guiding said misguided soul to a position where Rove can again play his political games.
Like a significant fraction of Nixon's crew--whose boss was actually impeached--I suspect that we haven't seen or heard the last of Rove....
EDIT: Classic error on my part. As pointed out in comments, Nixon was never actually impeached.