I saw this article on cnet and to be honest I think its fairly accurate. I believe apple is holding off on some of these to make the iPad 3 more "magical" I can see why apple didn't go the 4G route yet, as well as NFC
Here's the link
http://news.cnet.com/8301-13579_3-20038561-37.html?tag=topStories2
Here's the synopsis of things cnet believe apple whiffed on.
- Retina display
- SD card/USB
- Thunderbolt
- NFC
- 4G
The Retina display sounds about as physically unattainable as it can be on a device this large. None of the competitors have a display much better than the iPad.
OK maybe an SD card slot or USB port might have been nice, but for what? Apple keeps moving more and more toward wireless solutions, including the better AirPlay and better iTunes home sharing. There's an adapter for using SD cards, and a built-in slot would've been mostly useless without more usage than loading pictures from a camera. As someone else said, unless you change the file system and let people do more with an SD card or flash drive, those are pretty useless.
Thunderbolt was just released a week ago. How much of a help would this be? Also, would it be possible for Apple to later release a dock adapter to thunderbolt cable without changing the iPad's hardware?
NFC would be mostly a waste of money on a tablet. Who puts their iPad in their pocket to go buy something at CVS? Nobody. It makes a million times more sense on an iPhone or even an iPod touch. This is akin to whining that the MacBook Pro doesn't have a built-in satellite radio system.
Half the people out there claiming to have 4G skirted the definition and are really just using faster 3G. It's kinda like claiming you put music on a DVD when you just used an 800MB CD instead of a 650MB disc. There is also very limited 4G LTE coverage through anybody. Verizon has a few areas, AT&T doesn't have any. If you want 4G that bad, get a 4G phone and use it as a hotspot.
It's also worth mentioning, as others have, that it would've been impossible to include all of this and keep the prices starting at $499. I don't think Apple has ever released an update to a product and jacked up the base price, except for the Mac mini. That $499 price point is huge. Another year, another product.