[Q] Wireless eyepiece

We've all seen them, they are cute... but not wide spread for public consumption.

But, what would be immediate limitations to a tiny wvga OLED transparent eyepiece as an attachment to existing bluetooth (3.0) earpieces?

I was told the new 4G iPhone is supposed to be cheaper and much faster than the current version. So for the price difference you could buy a little eyepiece. See who's calling, scroll the contact list, etc.

lol they could call it the iPatch yukyuk.