I wonder what "widescreen mode" means, I couldn't find any description of that on the page? I have a couple of Atari consoles and a bunch of games that I bough

I wonder what "widescreen mode" means, I couldn't find any description of that on the page? I have a couple of Atari consoles and a bunch of games that I bought on a whim a few years back, but connecting them to my current TV is no longer possible. This would solve that issue with the HDMI connection.