The EON Super 64 is a plug-and-play HDMI adapter for the Nintendo 64, allowing you to play this classic console on a modern HD television, but it’s going to cost you.
For $149.99, this device connects to the back of the N64, allowing you to get HDMI output. It’s available for preorder now and is estimated to ship on July 22, 2019. The N64 looked okay on an old CRT television but looks blurry and generally bad when upscaled for modern HDTVs. The EON Super 64 claims to fix this problem. It allegedly delivers a 480p image, featuring lagless input, custom design, and a “Slick Mode” that cleans up hard pixelated edges for a more polished look.
Source: IGN.com It's Now Easy But Expensive to Play N64 on Modern TVs