NetBeans to be GPLed

Sun is going to release NetBeans, a popular Java IDE, under GPL. I'm not sure if this is good or bad and who will loose or benefit from this. And I do not see how making NetBeans "more Linux friendly" as stated in "Why GPL v2 FAQ" will make its users happier and the product itself more successful.

PS I'm not against open source. I'm against spending effort on activities that do not produce any value.