It's not hugely encouraging. Rumours suggest the new machines will be thinner (if you care), have no optical drive (due to the need for thinness) and have a "retina display", which probably doesn't add much for music-making tools, but may well add to the price-tag (and battery drain?).
But maybe I'm being overly pessimistic.
It's very likely.
Normally apple don't bump up the price and which an optical drive is certainly a relic in 2012 it's not certain they will simple turn the MacBook pro into the MacBook air. Battery improvements have been pretty good recently with apple so I'm not expecting a drop in battery life.
We will see...