Is anyone connecting a non Apple laptop (such as an HP) to a 2012 iMac (21.5") and using the iMac as an external display? I searched around lightly and found that most use their MacBooks and MacBook Airs but I really have not seen many folks use non-Apple laptops. I was thinking of picking up a 21.5" iMac and buying a cable (display port to mini display port). I was then thinking of connecting my HP laptop to the thunderbolt port in the iMac and using the iMac as an external monitor. This should work flawlessly correct? I just want some feedback from someone who actually has this setup and is happy with it. Much appreciated!