10 years is a really long time in this space. To be honest, I wouldn't be at all surprised if we're basically not writing JavaScript in 10 years, particularly with things like WebAssembly coming along—but who knows.
I'm hoping we see augmented reality take off within that timeframe, with AR glasses (or something similar) going mainstream. The tech isn't there yet, but it's getting closer every day. Freeing ourselves from the confines of flat, relatively small rectangular screens sounds like a really exciting future for UI, and it would have a huge effect on how we think about the web and on-demand interfaces.