I'm sure we will see some nice spec bumps, which in all honesty is usually what excited me the most. The better the processor/RAM become the better apps we get.
I don't think we will see NFC this year. I wouldn't have any use for it either way, but I'm sure eventually it will hit the iPhone.
The front camera has major room for improvement. I wouldn't mind seeing that, and I think it is fairly likely that will happen with the next refresh.
Siri is ok right now, they claim it's going to get better. I think in a couple years it might be really great.
LTE is coming I'm sure. I could take it or leave it. Faster is great, but the data plans are so ridiculous now I know a lot of people will start seeing some new charges when LTE gets here. I still have unlimited for now but I wonder how fast I will reach that throttle limit with LTE.
I don't care about the screen size as long as it doesn't get any smaller. I think at one point I did have an opinion. But I am numb from reading all of the thread wars about it and I just can't care any more. To clarify, I'm ok if the screen stays the same, I'm ok if it gets bigger. However I am against the design in the "stretched" rumors. I think that is a total cop out and if you're going to make the screen bigger you should just make it bigger. Length and width. There is some seriously huge bezel on the iPhone and while I never cared much either way about how the phone looked, I have to admit that I am starting to feel it looks dated with all that bezel.