I don't know why you're downvoted, there's already screens currently in development that have precisely this. They should hit around late 2021 or early 22. There are SOHO routers in development that have this (Q1'21), and the 5G modem isn't even for your usage, its for the manufacturer to push/pull data. There's a side-by-side fridge/freezer that has this already on the market. There's a (commercial) coffee machine for installation in to offices that has this.