We developed what we believe is the world's largest Android touch "tablet". Whether you call it a tablet, smartboard or touch panel, it's the biggest thing running the Android operating system that we know of. The beautiful 65-inch LCD touch screen can be used to do everything that an Android tablet can do: download apps, play games, watch HD movies, browse the web, edit documents, run photo slideshows and more.
Here's how it works: The screen is an optical touch screen supporting two-point gestures. The unit itself has no processor, memory or hard disk - just USB and HDMI ports and a power source. Instead it is powered entirely by a 10-inch Android tablet powered by an Nvidia Tegra 2 chip with 1GB RAM. The two are connected via a dock with USB (for touch input) and HDMI (audio and video).
Getting this to work required kernel-level changes to Android, including device driver changes for seamless handover from tablet to the big screen; optimization to support full 1080p HD; and support for docked vs undocked hardware modes. Note that this is not the same as simply connecting a tablet to a flatscreen TV via HDMI, called "mirroring." That doesn't give you the ability to drive the big screen with touch like this does.
For now this is a prototype, we're working on a wireless version (i.e. without dock), and with support for multiple tablets all interacting with the same screen and vice versa.
