No. It is more likely that Oregon will start voting like Idaho than vice versa. (and neither is at all likely)
Urban growth boundary is not that effective...
I would say Utah will be voting like oregon 2012 in 25 years, SLC seems to attract Californians pretty well. Boise not so much, and North Idaho can't support enough population growth.
Voting like Colorado 2012 is a possibility in 25 years, but not Oregon 2012. Utah had one of the strongest trends to Obama in 2008, even though it was still one of McCain's best states. The real test this year will be to see if Romney breaks 70%.
That's a given. The over/under on Romney in Utah is 80%.