roomie as a software solution works independently from any specific hardware. It's simply a progressive web app, which means it's particularly easy to deploy to ChromeOS and Android based devices.
However, you can also use it from your desktop computer or mobile phone, where it supplements some of Google Calendar's missing functionality.
Devices from partnered manufacturers
AOPEN Chromebase Mini 11''
The Chromebase Mini is a solid-state interactive solution designed to be extremely reliable and secure, making it ideal for interactive public displays in high traffic environments (i.e. as a digital signage, POS, kiosking, meeting room management or corporate environments).
Check out the specsheet here. Pricing starts at EUR 369,-
Handcrafted solutions
Raspberry Pi based
Hook up a touchscreen of your choosing (or check out this one) to a Raspberry Pi, point it to the roomie page and handle configuration per-device using HTTP query parameters. Truly independent and available at an unbeatable price.