What geeks tend to forget is that there are more consumers than content creators. There will always be a need for a traditional PC (aka: work), but for most people, tablets will be their main (non-work) computer in the future. The netbook trend exploited the fact that all regular people really want to do is get on the internet, check email/Facebook and maybe edit some Word docs.
The same thing occurred in gaming. Everyone likes to play video games, even girls, but not everyone is a hardcore gamer playing FPS and WOW. The casual gaming market didn't come out of thin air. It was always there, but the industry was too busy selling to l33t gamers and frat boys.