Who knows, Man has come so far technologically in the last 100 years, who's to say what someone's imagination will come up with? With travel to other planets, again, no way to know what's coming by then? 2 things that will limit us are population growth and availability of natural resources...

Yes and then we will start evolving backwards, there are only so many advancements to be made before human adaptation declines as a result of insufficient ecological harmony

50 years from now the few people left on this pitiful broken planet will be living in caves and killing each other for a drink of water.

We, who? Most of us will be gone way before then. No peak to worry about