On my mid 2010MBPro, Chrome runs in discreet mode. gfxcardstatus will not allow a change in video mode. Integrated video is not available.. So, my 2010 MBPro cooks my legs. And I mean cooks them. I have taken it apart and reapplied some artic silver. Fans are clean. I am really, really, fed up with the heat off the bottom of the computer. If I by a retina, I know that Chrome will trigger the dGpu, but does it stay cool? This has become a big gripe for me since I use it mostly on my lap.