The booth demo is a URL on a rented touchscreen

The conference rents you a touchscreen on a stand and a network cable. Your product is a desktop app. You open the display URL with ?decorations=false&toolbar=false&keyboard=true&sharing=true&steal=false and go fullscreen. Visitors tap through the app all day; the container on your server does the rendering.

Every twenty minutes a cron line restores the snapshot aliased booth-clean, so the next visitor gets a fresh state and the previous one's test data is gone. A second screen at the back of the booth opens the same URL with ?readonly=true, mirroring whatever the visitor is doing for the rep standing behind them.

Nothing was installed on the rented hardware, and nothing was shipped in a flight case. When the show ends you unplug the cable and walk away.