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Earlier quoted context omitted.
You get 42" versions from China for USD$118 each. I'd focus on the software improvements and benefits. http://goo.gl/N02wRa
you could probably connect this to rPi to make it smart/connected.
One tip from someone that has worked with IR emitters/detectors: make sure your product can handle direct and reflected sunlight. I'd hate to see you getting all the way through a kickstarter and then finding out you need to rework your frame to reject ambient and stray IR.
Don't these types of systems always use AC modulation for just that reason?
Virtual Ink, anyone? http://www.mimio.com/en-NA.aspx Think about how much fun it will be to try to sell expensive stuff to schools and colleges before you raise a lot of money for this.
Here's a poor man's version that uses If anyone's interested in playing around with it I'll put up some nicer usage instructions https://www.youtube.com/watch?v=PX8JnC7-K8k https://github.com/liamuk/Omniboard
Please don't listen to all the naysayers (I was about to be one of them) who are saying this has "already been done." Sure, they are right. But is there one in every room of every office? No. But there could be. The thing that has changed between back then when this stuff was first done and now, is that everybody has smartphones. The old dinosaur systems aren't priced to take this into account.
If this was a frame or a kit I could attach to an existing board, I'd be ordering it right now. Shipping whiteboards is expensive so I hope that might be an option.
As the Apple Pencil has demonstrated again, most new things aren't always quite new. There's few form factor, interface, or screen innovations. What will be new is new ways to create using what we have.
Where you come across them, Naysayers are usually self-doubting doubt worshippers. Every person with unimpressed input should be taken with a grain of salt relative to how much a person feels the only thing of value is if it's something new or novel.