The 3DS pre-launch event at Bristol this weekend had a rather spiffy hologram projector popping out bits of the 3DS interface.
According to Kotaku, it's a glass prism that projects 3D holographic images for passers by to gaze at in wonder. A rather funky distraction from the main 3DS testing area!
To get you ready for the 3DS launch events, Nintendo has been holding demonstrations in cities across the UK and will be popping by an area near you soon! To keep up to date on the 3DS tour, be sure to check Nintendo UK's event page from time to time.