My two cents: we're reaching a technological plateau.
We're quickly approaching the atomic barrier: chips can't get much smaller, and quantum or optical CPUs aren't anywhere near market. The new standard is 720p displays: we're very close to every new device having a retina display. Even a professional photographer doesn't need more than, say, a 12 Megapixel camera.
What enhancements are left?
Well, for one I would like to see more work done into graphene chipsets: they seem like the best choice to one-up silicon to me. We need to work more on improving graphics power and fitting more ram into these devices: all going to be pretty easy. A retina non-pentile amoled screen is about the pinnacle of screen tech, but I think autosteroscopic 3d has potential to be more than a gimmick. True holographic devices are a long way off. I personally think the current 8 megapixel standard for phones should be kept, with all enhancements to the camera going towards picture quality: I still sometimes use my point&shoot, which is 8 mp, and my phone has an 8 mp camera. There is, IMHO, no excuse for my smartphone to not have a better quality camera than my old $75 shooter.
After that, I would also like to see phones begin to adopt MicroUSB3.0. Faster transfer speeds make everyone happy, but the big deal here is that 3.0 can transfer a lot more power than our aging 2.0 standard - enough so that there can start to be a standardized charging cable for tablets as well. Only thing better than our 3000MaH batteries would be being able to charge them to capacity in a third of the time.
Wifi AC will not come to android quickly enough. Also, android beam needs to be pushed hard. Jellybean and the JB nexi should include wifi AC and when touched create a wifi AC adhoc connection: near instantaneous transfer of anything.
Inductive charging should become the standard for all androids, and a true charge-in-your-pocket wireless charging method should be one of R&D's main goals. Also, I want to see the automakers accept the new inductive charging standard and make cordless charging a no-brainer. Who here DOESN'T put there phone in the cup holder? It'd be perfect.
Battery tech is going along at a nice pace. I think that we can see a nice, slim, 4000MaH phone in all our near futures.
On the software side, all I want to see in JB is moto's new webtop making it to the ASOP and systemwide native support for quad core software threading
In a slightly further projection, I see a combination of project glass and project majel really changing things. But I like to keep my requests reasonable