If Obama wins Virginia, North Carolina, and Florida down south, along with holding the western States of New Mexico, Nevada, and Colorado, then the 2008 election will increasingly be seen as a realigning election, where increasing Democratic inroads into hispanics and younger voters changed the map for the foreseeable future to open up both parts of the South and West.
If there's one downside to a big EV victory, it's that this apparent realignment will be more likely to alert the GOP that they need to change if they want to remain electorally viable. A narrow victory gives them mental room to blame the candidate or fraud or anything else that is not themselves.
Still.. I want them fucking crushed. Let 'em fight over their party's future for my entertainment!