I recently saw an old episode of The Big Bang Theory where Sheldon gives Penny a presentation in the laundry room. He attaches a small USB kind of device which acts as a projector. I couldn't really see what it was.
Anyone know which device it is or is it just some fictional technology?
I don't recall the episode, but that technology isn't fictitious: they are usually called 'pico projectors'. They tend to be relatively dim but uber portable. I think some of them even attach directly to an iPhone.
It has the right form (projects out the long end, and a shiny control area on the top/back) and options (remote control, USB cable connection), and size (roughly hand sized - I think it is actually smaller WxH than my Galaxy Note 2).