I'm lusting after a material thing, and I'm a bit ashamed.
Still, this is just about the coolest hat I've ever seen: A top hat with a built-in set of LEDs (seen here from the artist's YouTube video) that plays sequenced animations, including images from Space Invaders and Pac-Man. It also displays bouncing hearts, the alphabet and all kinds of other images.
I'm not sure how comfortable this hat would be, but hey, who cares? You can walk around with wonderful animations scrolling on your head, and that obviates simple comfort.
This reminds me of things I've seen at Burning Man, like Mark Lottor's Big Round Cubatron, a huge sculpture that plays beautiful sequenced animations on thousands of LED-filled ping-pong balls strung out from a center pole.
But this, you wear it on your head and can bring it around with you. Now, all I need is some electrical engineering skills, so that I can build one myself.