The N64 may not have had the prettiest games, but they can certainly look a bit better when you up the resolution. The N64 itself lacks any options for a true bump in resolution, but the N64Digital HDMI upscaler should do the trick.
The company behind the device says the N64Digital will come out in April 2021, and it'll offer N64 fans the following.
- Digital lag-free HDMI output up to 1080p
- Analog RGB/YPbPR through multi-out
- Simple firmware update procedure via WiFi
- Video Filters: Deblur/Scalines/Smoothing
If you want to see some more visual examples of what the N64Digital can do, check out the official site here.