[malandrew]

Basically the framework was designed from day one to target the weakest devices for which decent results are possible. The plan is to expand support from there. Since mobile devices came first, a lot of the work so far has been focused on touch input and higher order touch gestures that involved several fingers.

Mouse support in desktop browsers will improve over time. Designing input to accommodate two fairly different inputs is pretty tricky and this isn't a solved problem anywhere yet. Sites/apps that work in both mobile touch and desktop browser settings currently all use mouse pointer interactions (basically just tap, double tap, swipe) Adding multi-touch interactions complicates things quite a bit. Since we're working from mobile towards desktops.

We're working on better desktop support ourselves and would love contributions from the community that help improve the desktop experience for everything.