Oakleaf, love your sig 
This is a fascinating discussion and I'm soaking it up. Will look for both those last books. I'll pipe up with my personal experience: I love reading, and I read a lot of fantasy and sci fi for relaxation. In addition to more challenging stuff. As a kid and teenager I could read for hours on end (academic family that approved greatly of reading) and could easily miss a nights sleep. Today I read a lot less, I need my sleep much more and just don't have the time. Besides, I'm used to being more active now so my body just plain protests against sitting still that long. I've tried playing video games, and have sat up until 2 am playing Myst. It was much of the same experience as reading fantasy books, getting lost in a different world, but the effects are much stronger and I can feel how easy it would be for me to get really, really addicted. I don't feel there's a big value difference between reading for fun and relaxation and playing similar video games for the same reason, but games are more addicting, especially if you have that type of personality. My son does, and I have to pry his latest book out of his fingers to get him to eat breakfast without spilling porridge everywhere.
There are many excellent books out there that can change or challenge your views, inspire you and teach you stuff you didn't know. I know there are some truly brilliant games out there too, but there's a lot of stuff, both books and games, and movies for that matter, that are mostly "just" entertainment. Entertainment and relaxation isn't a bad thing, it's just a problem if you have trouble fitting the meaningful and necessary things into your life as well, imo.
I encourage my son to play games with his friends when they're here, I try to discourage him from playing the same, repetitive games over and over he plays alone when he's bored.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett