CES 2013 - I know I've said it a few times in the last few hours - but wow, are we seeing a push with 4K. Now we have 3M showing off their 84-inch multi-touch table that sports an Ultra HD 4K-capable panel.
Last year we saw the 46-inch 1080p-capable model, but this year we're seeing a near double in size and huge jump in resolution. The new 84-inch screen sports the ability to handle simultaneous inputs - up to 40 at once. This is double the amount of concurrent touch inputs that the old model was capable off. The Verge reports that 3M expects to increase this number to 100 though before it hits the production stage later in the year.
3M have also switched from the ITO-based sensors to a new "wire-based" solution which the company says has allowed them to reach a huge size all without "degrading touch performance". Usually large screens have bad input lag, which we're slowly seeing companies fix.