Geeky, I know. Extremely!!
I was chatting to someone last night about light fields and it reminded me just how mind blowing they are. Essentially a light field camera captures 4D light information rather than 2D like a traditional camera - rather than recording a flat image it records the light levels in a volume allowing you to do all manor of clever things in post-production.
For anyone interested in exploring the frontier but is short for time check out this video,
For anyone hungry for more intel this podcast from the CG Garage Podcast delves in deep(ish).