Primarily, Aurelia is about the open web platform. We aren't into promoting platform or vendor lockin. I've been burnt by that many times in the past. The world we want to see is one where native apps no longer exist and all apps are built with open web technology. To that end, we are building a capable platfrom and ecosystem to obviate native.
That said, as mentioned in other questions, Aurelia is built on a platfrom abstraction layer (PAL) and is a combination of carefully decoupled components and services. It's quite possible that an enterprising community member could make it work with native. But ultimately, I'm not sure that abstracting away the native platform is a great idea. I've seen that go badly many times over. Keep in mind that things like react-native aren't new at all.