OK, this is a different take, And I would say: yes it will more than likly expand on air flow and lower temps, which means higher clock rates.
But and there alway is a butt. At What cost? I generaly get a new video card every 18 months and some do every few months. No way are people going to drop over 500 dollars on video cards. The nature of gaming and computer in general is that it changes to often.
Here is a case where Moores law says it not worth the R&D