Revisiting Jeff Han's 2006 multi-touch demo: the interaction paradigm still holds up

GrantCuster · x · 2026-11-10

GrantCuster shares a collage of thoughts on Jeff Han's famous Feb 2006 multi-touch interface demo, concluding it holds up remarkably well.

Built on a 36-inch repurposed drafting table using Frustrated Total Internal Reflection (FTIR): infrared light trapped in an acrylic screen scatters downward at finger contact and is captured by a rear camera.
No panning or combo gestures means many simultaneous touches without conflicts; the photo light box with two-finger scale/rotation is called the killer app of multi-touch, and remains the core canvas interaction the author builds around.
The collage also covers lava lamp (heat by touch), maps, puppeteering demos, and Dorian Taylor recalling seeing proper multi-touch gestures in 2006.
Observation: core interactions are simple and durable, but preserving conflict-free multi-touch gets harder as capabilities accumulate; the tech has since been mostly replaced by capacitive touch.

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