You mean native mobile and desktop apps? That's definitely a much longer-term goal (and even more unclear :) but theoretically, given that Wasp is being designed as stack-agnostic framework, it's possible which makes it really exciting.
We thought about it a bit already and definitely not 100% of concepts from the domain of web apps would apply (e.g. routes maybe don't make sense in mobile apps), but there is still a lot that could be share. Maybe Wasp could also generate some SDK you could use from your native mobile code.
That's all long-term stuff so really hard to know, but we imagined we'd first focus on getting to 1.0 with React & Node, then add support for more client/server stacks (e.g. Vue and Python), and then go towards mobile and desktop.