Switch pro will likely have some 4k output available to it. Some indie games and streaming services. Matching up the current resolution of the mainstream TV has never been what impacted Nintendo sales. Plus switch will have multiple models and many switch systems are being sold and have been sold as a handheld mainly purchase.
Wii didn't match up well with mainstream televisions. Sold like gangbusters.
Wiiu matched up well with mainstream televisions. Solid like garbage.