I agree with Trips.
I'm all for progress and I'm all for faster motors... but... call me crazy if you want, I think half the fun is tuning those suckers. If everybody is running the same motor/esc combo that (in theory) always performs the same, where's the fun? Sure, it's a spec class, but what happens when every class is a spec class?
I hope brushless motors take off but I hope they don't replace brushed motors altogether. Might be wishful thinking, but still.