And do you know what? It won't improve preaching one bit.
Why? Well, it's quite simple: There's a world of difference between preaching without notes and pretending to not use notes.
The preacher who does not use notes has to have internalized the text and the big idea of the text so much so that they are able to speak it conversationally.
The preacher who uses notes has not internalized it to this extent . . . so even if he looks like he's not using notes, he will still sound like he is.
I have a horrible memory. I write out an outline and a complete manuscript for each and every sermon I preach.
But still, I don't use notes.
I don't use notes when I preach for a variety of reasons . . . but one of the most important reasons is this, "If I can't remember it, why should I expect my congregation to remember it."
So, I predict cool, hip preacher-types will flock to get google glass. But it isn't really going to change anything.
You've heard it here first.
p.s. I've never been so excited for a piece of technology to come out and I actually want a pair . . . just not for preaching.