I see JSPM as something more forward looking especially thanks to its HTTP/2 support. You can see some convergence, though, now that both JSPM and webpack 2 support SystemJS semantics. I feel that's one of the missing bits of the puzzle. ES6 gave us a module definition, but it failed to deliver a module loading mechanism. SystemJS gives just that.
I think the next year or two will show where JSPM will head as a project. It's always cool to see new tooling. There's still a lot of room for innovation in the space and competing projects are a good thing as long as you don't overdo it. Ideally we would find commonalities between projects to avoid reinventing the wheel too much.