I don't think anyone could predict that with any certainty. I personally think it will be much more involved in being more involved in the "whole house approach" or "whole building approach". I think the whole energy movement stuff (BPI, RESNET) energy auditing is persuading more & more HVAC contractors to get involved in treating the whole building (insulation, air sealing, reflective roof shingles, solar power) rather than just slapping in a replacement system based on what was previously there. I've seen the change in this site just since I've been a member.
An answer without a question is meaningless.
Information without understanding is useless.
You can lead a horse to water............ http://www.mohomeenergyaudits.com
In NW Indiana 2 yrs ago when the new construction went dead the outlook was will be better in 2 yrs. Its far worse than better. Banks here aren't letting go of money easy even to qualified people with everything in order. Its come full circle when I started mid 80's. If you can fix stuff you have a job. Anything much else that came along was just a bonus.
I shifted from so much new construction to concentrating on service before things fell down. The bad side was the guys that only know new construction I no longer kept. The line is long with installers and nothing to do or no job here.
"The Bitterness of poor quality remains long after the sweetness of low price is forgotten"