Yes, during times of economic crisis, most portions of the entertainment industry do well, but only if they provide a lot of entertainment per dollar.
Best example is during the great depression, radios sold incredibly well - because once you've bought it, unlimited free entertainment.
And that is why video games do incredibly well
Video games (in Australia) are about 4 times the price of dvds, and yet a good game can give you 50-100 hours playtime. A good movie can be watched a few times, say 5 hours playtime. That represents incredible value.
However, Sony is (this isn't a criticism, the same is true of Apple, whom I love) not a company that provides cheap entertainment. Their products are generally aimed at the upmarket, and carry high price tags. In todays economic climate, people would prefer a $200 dollar console that can play most the games a PS3 can, would prefer to buy a cheap laptop rather than a VAIO. So Sony is one of the more vulnerable electronics companies (but then again, Apple is doing well even in its computer business despite aiming upmarket in that field)