When Roku announced its first set of self-branded TVs last year, it said that it was getting serious about selling its own TVs. Back then, the company announced cheap LCD TVs (and even a reference OLED TV for partners). Now, the company says it wants to bring affordable TVs that also offer great picture quality. To that end, the company has announced the Roku Pro series of 4K TVs to compete with LG, Samsung, Sony, and TCL. Roku Pro 4K QLED Mini-LED TVs cost less than $1,500 Roku started as a software company that sold media streaming b...