The “Roadmap” section of the forum shows several products that are in development and in testing. An outdoor camera, video doorbell, smart thermostat, full-color bulb, additional bulb sizes, smart bathroom scale, and smart door lock are all on the horizon. And most likely some other things that haven’t been confirmed yet
So far, they’ve run into some limitations that prevent them from supporting HomeKit, but I don’t know what the future might look like. There’s a wishlist thread about that here that also includes some comments from Wyze employees.