Mike Loewen had a very nice custom TRS-80 Model 4 display. These things had amazing graphics cards, as well as some impressive storage capabilities, and even a non-standard picture tube color on one model.
I played space invaders on the heavily modified machine, and did surprisingly well, setting a nice high score. I never did ask how long my high score stayed up on his machine. Either way, I’ve never seen a TRS-80 this powerful before.
I spotted Q*Bert running on a TRS-80 Coco 2 or 3 (I never did look at the badge plate). I suck at Q*Bert, so I didn’t embarrass myself. Meanwhile, some CoCo enthusiasts were performing repairs on one of their units.
John Mark Mobley had a Tandy TRS-80 MC-10, and a Sinclair ZX-81 just chilling out on display. I don’t think I had ever seen an MC-10 before, and I was disappointed that it wasn’t hooked up for demonstration.