I’ve had a Mac Pro for the last 5 years and have loved it. What I have liked is the ability to upgrade myself. Not sure which direction I will head with my next machine given the ability to have massive NAS’s for pretty cheap. Storage has always been my issue.
(That's about the only thing my G5 is doing these days....)
I’m still using a G5 at work and it’s still fast for Photoshop, although I’m not trying any video. IMHO, at the high end, the number of applications that really demand the latest and greatest keep diminishing.
I have a cheap Core i5 laptop that does 1080P video from my DSLR without complaint. I do most of my basic video editing on my iPhone, which is a far cry from a Mac Pro.