During our time at Float, we were using HTML5 and secure web sockets to create methods for connecting smart phones to web browsers or public interactive displays, and use their phone to control interfaces over wifi or mobile 3g/4g networks. This allowed people to quickly and easily have high fidelity controls over interactive displays - without preloading any software. This interactive cover flow demo shows the concept.
NuVue Pairing Concept.
While at Float we also developed a pairing and control platform, derived from Snap2me, that connects an HTML5 interface on a device with an HTML5 web applet on a phone, without requiring the user to preload any software, they can pair their smartphone, and use refined controls: swipe/touch, accelerometer, gyroscope, etc. to control the connected screen. This prototype interface was in a fully 3d environment, and allowed for a variety of 2d and 3d content. With this technology, multiple users could conceivably share control of interactive displays with multiple control technologies, and with a variety of content types.