I'm looking for an expression to use about a recent technology, where there are some uses already, but there may be more not yet widely known, and people are still figuring out what to use it for. I would like to say for example
It's been 3 years since smartwatches came out, but [there are more possibilities in them that can be leveraged that people don't know about]"
meaning that there is a new use coming up which I'm going to talk about. What I would like to express is that there is something more in them, that has not been leveraged so far, but is about to be.
I know about "more than meets the eye", but I'm looking for something that refers more specifically to a new way that something can be used in.