Which iPad upgrade do you want most?

Apple has not confirmed what it will be announcing at 6pm (UK time) this Wednesday but the string of leaks have given us a few pointers about what we might expect.

The screen and processor are the most obvious targets for an upgrade, and rumours from Apple's manufacturing partners in the Far East suggest both will get one.

The new iPad will almost certainly have a much-improved display compared with its predecessor. It is expected to have a so-called 'Retina' display and be capable of full 1080p HD. That has led some to suggest that the new iPad will be called the iPad HD, rather than iPad 3 or even, as others have suggested, the iPad 2S.

Whatever the new iPad is called, it will probably have a faster processor than the iPad 2. The current iPad is powered by Apple's A5 chip. The new device is expected to have an A6 chip, which might be a quad-core processor, though some sources suggest that it will be a dual-core chip like the A5.

Both cameras on the iPad 2 are fairly poor quality and could do with improvement too. But few people use a 10-inch tablet computer as a camera but there is room for improvement. So it's possible, though by no means likely, that Apple will upgrade the cameras for the new iPad.