Scientific progress.

We are not discoverring any new laws of physics, string theory has been in the hypothesis stage since the mid 70s and things like DNA and computers are just complex arrangements of existing knowledge.

Has science reached the point where the only thing left to do is invent?

>>1
No, but modern scientific has lost much of it's innovativiness due to taking theories as truths. Also new inventions are never popular when they're new. It takes atleast 10 years and sometimes more than 50 years. Also most military R&D is highly classified and they like to show off only old stuff.