This is a general trend map. On the whole, I think that the states in blue are treanding more conservative (when you balance economic and social issues) and the red states more liberal. The grey states will remain about as is.
The three major trends that I see causing the conditions my map perscribes are:
1) The conservative party (presumably the Republicans, but not nessesarily) will break into the inner-cities and start picking up a better percentage of the vote, as more older cities begin to renew themselves.
2) The liberal party will gradually start to do better in areas that have large suburban populations and as the inner-ring suburbs of the old cities become the new depository for all of the problems that haunt the inner-cities now.
3) General population patterns.
*edit*
General trend map - d'oh!
And NM may end up trending conservative, depending on which issues are important (social and foreign policy favors a shift right, economic ones a shift left).