Many people, notably comedians, complain that they haven't seen the future they feel they were promised as children. The most common complaint I hear is the lack of flying cars, which would indeed be fun.
Watching The 10th Victim, I realized the things I feel like I was promised that I'm bitter to not have are groovy future-wear and bloodsports.
Let's get movin' people! I haven't got forever to wait for the future here!