A robot that ran around the Exhibit Hall taking photos. The photos were stitched together in Recap, a photogrammetry program.
About 9,400 people attended from all over the world. 
Most of them guys! Single ladies, if you want to meet an engineer type, this is the place.
You had to have a tablet or smartphone to know what was going on.
600 classes in everything.
The graphics during the keynote and closing presentations were beautiful.
Breakfast is served. And lunch and dinner.
Custom 3d printed Legos! Programmable, yet.
The inside of the Venetian, where the conference was held. I got lost a few times.
Jobs are even being outsourced to anime characters now.