I know right, these days I just open browser with Gmail and youtube home page (not even watching a video) and do nothing - 10%+ CPU utilization (i7, 8 cores).
Start serfing the web - laptop fans go into overdrive.
It's almost like how much $ and how many cores needed to render bunch of text and images without lagging.
And that's my home pc, it's blazingly fast compared to one in office with internal enterprise software installed on it.