Quote: Originally Posted by io There's no way of even knowing you have the newest one except for model number, right?

The most obvious way to tell is what connector it uses for the charging/sync cable. If it uses the new Lightning cable, it's the iPad 4. If it uses the old 30-pin iPod cable, it's the iPad 3.

And yeah, the biggest change is the new processor, which is supposedly twice as fast. It probably won't make a big difference right now (at least not with most apps), but in another year or two when the iPad 3 is starting to feel slow and obsolete with newer apps, it'll have a bit more life to it. That being said, I can see some overall performance difference between my iPad 3 and my iPhone 5 (which also uses the new processor), so I'm assuming that a similar difference would be visible between the iPad 3 and the iPad 4.