I have to agree with BerserkRules (sorry, don't remember your name!
) on this one. I don't think it's realistic that Leonard just move on. Remember how Penny said 'I've said the L-word too soon before and it didn't work out well.' Well, that left Penny scared for future relationships. Now, Leonard is in that same position. So I agree that she needs to lose her power over him, but not because he moved on. They'll have to figure something else out if they want to go that way.