Roku TVs afford you all the same features and apps the dinky set-top boxes do without cluttering up your entertainment center. Last year, Roku caught up with the times by launching the Ultra HD-ready Roku 4, also setting the stage for its TV partners to build 4K sets with the platform baked-in. Chinese manufacturer TCL was expected to be the first to market, but it's been beaten to the punch by Best Buy today with the launch of the first 4K Roku TVs under the retailer's Insignia brand.