I just have to share this innovative set of concept gadgets from a company called Canesta.
These weird looking pens are intended to double up as both virtual keyboards and image projectors so you can do away with your laptop and screen (or projector) for good! Sadly, these are only concepts at the moment and I imagine the power requirements for bright light projection may make the development of these tools rather challenging. But I'd love to have a set of these in my laptop bag! The virtual keyboard component though is already a reality. You can buy something like this today from companies like eXpansys for a little over £100. But not yet in a pen format!
Check out these photos!