While the likes of Google, Asus and Samsung have been giving it a good crack lately, the Apple iPad remains the very best tablet you can buy today - and now that Apple's got global 4G and its new Lightning port on board, don't worry about an immediate follow up.
Apple's not tinkered with the formula much: the metal iPad 4G is the identical size to the third gen, and it's all the better for it; This is the most polished, premium slate on the market, even if it's not the lightest; The screen is the crown jewel though, and has to be seen to be believed.
You could argue that the new port on the bottom of the new iPad 4G is a downgrade: the smaller Lightning port is easier to use; but it does mean it won't work with existing cables; docks and accessories.