“Yet”
Here's a way to figure out if it pays to adopt a new technology.
When you talk about your market or your peers, do you say, "no one is using it…" or "no one is using it yet"?
Yet implies inevitability. If they're going to use it, it might make sense to get there before they do.
[Worth considering: The difference between a technology where getting in early pays dividends, and those that don't. For example, having a website or a blog or a Twitter account early can help, because each day you add new users and fans.
QR codes, on the other hand, don't reward those that get in the ground floor. You can always start tomorrow.]