Instead of replacing our biological eyes with improved digital eyes, it would be better to simply add the digital eyes externally. My choice would be to mount them on the ends of two steerable "bunny ear" masts, which would in turn be mounted over the ears. By having an extra (better) set of eyes mounted on the end of these steerable "eyestalks", the wearer could see in all directions, around corners, or quadroscopically. Later, when digital ears are produced, these too could be stalk-mounted, giving the wearer a 360° sight and sound experience.
For a normally sighted person this would be a luxury device that they could cut on and off (and see as normal when it wasn't in use). You could easily use computer programs with the device as well to create a visual overlay onto your own field of vision. For example, targeting devices could be displayed directly onto your vision without blocking what you were looking at. You could switch to infrared if you needed to. But you could immediately switch from that to a book you're reading (but the words could be scrolled on a screen that was projected onto your vision). Or a music video/movie. You could stop reading and immediately receive incoming visuals from your children/lover/friends etc (complete with sound via a cochlear implant ;-).
The cool thing is not so much the digital/optical feed but the ability to interface computers to the brain... Just a rough estimate assuming 10 million bits are flowing through your optical nerves right now- that's what- just over a megabyte of bandwidth straight into the brain? Not too shabby. A lot of computer/internet things could be made redundant and one megabyte would offer a really good effect. And that's just through the optical nerve. One step further has them plugging straight into the brain. The multiverse is the limit after that.
I would like to have some gadgets like you're talking about as well. They would fit into my structure as well.
Most moms already come equipped with these.
Cheers!