A little creepy. Warm enough to convince me not to upgrade.
Own an iPad original. Tempted (very) to get the new iPad. Tried it out at the Apple store. Screen, size, weight were great. Speedy, too. But the original runs cool.
And the warmth was a little creepy. Not hot or uncomfortable. But it harms the illusion that this is just a window into another world, or that it is a book, or a magazine. Real world objects don't get warm like this. On the basis of this reaction, decided to forgo the upgrade at the moment.