1. The inter-cranial internet would be invented. Imagine, all internet, all the time, free and direct to your brain. Boring meeting? Nothing on TV? Surf the net from the comfort of inside your own head! (wireless, of course)
2. All you can eat buffets would be 100% calorie free. Eat all you want, without the unpleasant side effects!
3. Work would actually be fun.
4. There would be perfect weather, whatever the season. Want to go to the beach? Feel like skiing? Just snap your fingers, and hey-presto! perfect conditions!
5. Free auto-pilot hover cars for all, need I say more? (I mean, who wouldn't want one? :) )