Those were by no means "new inventions", it has all been there before on the web just on a different scale.. and now the non-techs are catching up and celebrating all the "great, new technology".
But the last truly revolutionary inventions and "paradigm shifts" certainly did not happen during the last 5-10 years and yes, on the whole the web IS pretty stale IMHO - and I dare to say you can see just how stale it really is by how much every new "genius" website gets praised and hyped as if it was an invention like electricity and just lifted us from the dark ages into the future.