Why the future doesn't need us

Bill Joy's thesis is that we are becoming too advanced and are trying to make things easier but at the same time we are digging our graves. We create these spectacular machines that can do all sorts of things for us, in turn creating devolution. We want these robots to do everything for us so we can sit around being lazy which is making people fat, lazy, and unmotivated. If you look back to when we didn't have computers or even cars for that matter; how many people were obese? It's because they got up and worked for a good portion of our lives.
The human race can avoid becoming obsolete by creating devices that can do everything we don't want to but the difference is that we still have to provide manual labor. It won't be as hard to accomplish the tasks at hand but, it will get done and possibly a lot better because there will be someone there that can fix any necessary problems. No matter which way it's thought about people are always going to be necessary for the future because the future needs the human race for there to be intelligent life on this planet.
I think Huxley would say something on the lines of that is exactly what he was trying to get at with "Brave New World". He would either say that or he would completely disagree with it or argue until no end. It's basically a different version of BNW there a just a few differences that you can easily connect to one another.