As a follow-on to Douglas Barrie's post of the UK's new Defence Technology Plan, I just have to provide a link to this video, with the Ministry of Defence has just posted on youtube.
Video: UK MoD
It shows a concept for the Future Protected Vehicle, which is intended to have the effectiveness and survivability of a main battle tank but supposed to be much lighter. The vehicle carries its own ducted-fan UAV. But I particularly like the illustration below from the MoD's news story on the launch of the DTP. After all, why carry a gun when you can have a little wheely thing do it for you?
Concept: UK MoD