Jason Snell:

Speaking of heating and overheating, I’ve heard from a lot of iPad users who seem really concerned that the iPad mini with Retina display is going to get too hot. Is this a reaction to all those stories about the iPad 3 running hot, way back when? Maybe. Anyway, I tried a bunch of stuff on the Retina iPad mini and the hottest it ever got was slightly warm. This doesn’t seem to be an issue, but I’ll keep checking.

Yesterday, as I was setting my iPad mini up for the first time and all my apps were downloading because I was restoring from the iCloud backup of my iPad Air, the bottom-third of the Retina mini was noticeably warm. But not hot.

Jason Snell’s First Look at the iPad mini with Retina display