I was looking at Holger Merlitz's site and saw this was new. Not digital binoculars in the sense of a cheap binocular with a cheap digital cameras, but replacing prisms with electronic images as in the digital cameras.
http://www.holgermerlitz.de/digitalbino.html
Seems like an idea whose time has come and I'd be astonished if there was not a prototype in the Canon lab already. As Merlitz says, the lenses and the electronics are available. Moreover, the color space of current LCD displays pretty much covers the human eye range, so the main issue is how to get an immersive display similar to what one gets from binoculars.
A simple screen display as with a camera won't do, rather a microvision type eyepiece will be needed, with superior resolution/inch plus very fast refresh while retaining the color range. That is not yet in hand. While there are military microvision displays, for maintenance technical support, gunsights etc, resolution and color quality are not great.
Funding the technical improvements needed here is hard to justify just for the binocular market, so there has to be some other mass market application for it to happen.
OK so after a long day in the field you glimpse that sought after bird, it flips up onto a post and just as you focus on it, the batteries run out! I think I'll be sticking with old fashioned optics for a while yet,