In April 2022, cable operators Comcast and Charter announced a partnership that the companies said would produce “a next-generation streaming platform on a variety of branded 4K streaming devices and smart TVs.” A few months later, we learned that this joint effort would be called Xumo, and now the first hardware device is making its way to customers. It’s called the Xumo Stream Box, and at the outset, it’s available within Spectrum’s service footprint — with availability for…