He's always been an excellent actor. I wish he'd keep working. But he's of an age where if he doesn't want to work, he shouldn't have to. And I agreehe looks great and would be great in roles for men of a certain age.
I'm watching something starring his dad and am struck by how much father and son look alike. And both with such talent! Sometimes the son doesn't inherit the talent of his parents, but this time, Walker Jr did.

http://www.startrek.com/startrek/view/news/article/10196.html
He still looks great. Aging has even given him a more interesting actor's face. He looks very happy, too, so I guess he's getting to do what he enjoys. I wish I could've been there to see them together. They sure made the sparks fly in their classic ep of
ST:TOS
!

There are a number of photos out there of him at the 2005 Grand Slam Star Trek convention. This page has a nice article as well.
http://www.startrek.com/startrek/view/news/article/10196.html