In my mind, baby boomers right now are around their early to mid 60s roughly, and considering average life expectancy is
77.7 years, I think if we see a decline it will be more around 2020
at least (although you do give it a 2015-2020 range).
Another note on the baby boomer generation: more people in that generation has already resulted in more offspring, and more patients in the future even after their generation has passed on.
Checkout the population growth in our country...it may grow by different degrees, but it's
always growing. You may say that would mean likewise more PTs entering the work force (and devaluing PTs universally by their availability), but things like the time/money investment of the DPT will specifically weed out the number of prospective PTs.
Also, if there were fewer applicants for PT, wouldn't that mean even greater scarcity (and greater demand, equaling greater pay) for PTs? I'd actually view that as a good thing for a new PT graduate.
I know the DPT is viewed differently by PTs currently in the work force, but in my mind as someone about to enter grad school, it's a short term sacrifice for long term gains for the profession. My quick conclusions are actually the opposite of your concerns; I think the DPT will lead to an
increase in the value of therapists.
Just my thoughts on the matter.