What Apple seems to do is a mantra that can be used for a myriad of purposes:
"Just because you can do something, doesn't mean you should."
Apple could have put a pair or camera's on the current iPad, yes, but FaceTime wasn't on any other device. The question is even - will Apple put camera's on the iPad at all?
Whether or not you agree with their decision not to put camera's on one or multiple revisions of the iPad does not automatically make them wrong - or evil for that matter. It's perfectly legitimate business not to put all the bells and whistles on a first-gen device, and while consumers might not like seeing the new product be much better than the old one, it isn't a crime or should even be frowned upon.
Pricing concerns, the worry that the iPad might flop, and a lot of other factors come into play when making a new device in a traditionally failed market. The iPad took and still takes a lot of chances with some design decisions and I don't blame Apple for being a little conservative - no matter how much I want them to make the end-all device.
What Apple puts on the next iPad is still anybody's guess, so I'm not going to. Whatever it is, I think we can easily conclude one thing: It's going to be iterative and a safe play almost for sure. Apple does not completely redesign a product for a second generation, that's what third- and fourth-gen products are for. Even the iPhone did not have a complete redesign before the iPhone 4.
Technology being purposefully held back is not a strategy I think Apple wants to use. They have other concerns such as getting enough supply, guaranteeing long battery life, and so on, to worry about and yet they do not ever seem to be standing still. The Macbook Air and the iPad, I think, show that Apple, whether it's smart or not, is always at the front of the curve in terms of technology. They aren't perfect at it - the continued lack of Blu-ray and USB 3.0 or similar standards prove as much - but they don't seem to be into the whole 'follow the rest' strategy, for better or worse.
All in all, I doubt Apple will make huge changes and yet I can see the lines appearing for the new product already.