Future Combat Systems
Thats a quick look on what the U.S. Military is working on. I actually think Wikipedia's stuff on FCS is a bit better though. One interesting thing to note about FCS is the lack of a Main Battle Tank. The U.S. Defense Department has declared/acknowledged that the Main Battle Tank is obsolete, so what you'll see with FCS is a much faster and much lighter armored vehicle that essentially amounts to be a self propelled fire support. A big thing that makes the tank obsolete is that in any kind of terrain or environment it can be out classes and destroyed by something much cheaper and more mobile. The key part of that last sentence being the words "more mobile." Mobility is the name of the game for warfare in the future, and it's one thing that FCS hopes to accomplish.
Another thing that FCS stresses is communication. With all sorts of equipment and units on so many different levels flawless communication is something that will be needed to effectively engage in combat, and flawless communication is something that the U.S. Military is currently lacking in (example: The Marines were apparently using Line of Sight radios in Fallujah).
There is a limit on how much you can do with unmanned aircraft, armored vehicles, whatever, though. Unmanned systems will mostly be relegated to reconnaissance roles. Specifically speaking, the Class IV UAV is not designed to operate autonomously, but it will rather be one of a number helicopters in a team, one of which will be manned.
The most information about FCS you'll be able to find is about the Future Force Warrior, which is the U.S. Army's model for future infantry. There are some interesting plans for that, one being a new concept for body armor, consisting of iron filaments suspended in a silicate oil.
All in all, Future Combat Systems looks to be the U.S. Military's answer for everything, from fighting guerrilla type resistance to taking on the armed forces of another nation. Once again, the keys are communication and mobility. There is no situation where those won't give you an advantage.