IEEE Spectrum reports on two of my favorite items, monocopters and tail sitting aircraft: Weird UAV Demos: Lockheed Martin's Samarai and Aerovel's Flexrotor.
I've commented on the Samari monocopter drone a few times over the last three years or so. It is cool that it can navigate autonomously and that they can stabilize a surveillance camera on it. I know of two other guideable monocopters, a palm-sized one built at UMD and one by Woody Hoburg at MIT. LockMart's latest version is 3-D printed, has two moving parts and can provide 360-degree video without a gimbal. I also note that the propeller is on the wing instead of on the counter weighted boom. Pretty awesome stuff.
The Flexrotor, in true tail-sitter form, takes off, lands and hovers tail down and transitions to horizontal flight. I think this profile will work better for an unmanned table-top vehicle than for a manned one.