In some ways, it really is the perfect thing for silicon valley during boom time. If you are paying three grand a month for a one-bedroom apartment, paying forty bucks for a really good delivered dinner doesn't seem like that big of a deal.
The interesting thing to remember about the first wave of food delivery companies is that some of them survived the crash... which is really quite a feat, because a lot of people went from being really wealthy to being... not. But you can still order from waiter.com.
You may as well be amused that sit-down restaurants exist.
I don't think it's going to "revolutionize" anyone's lifestyle the way Uber did. They might say so, but that's because no one wants to talk to you in the Bay Area if you're not disrupting something.