О! This is a great topic. Guys, let's talk about it.
In fact, here are the image requirements of the Chrome Store:
Global screenshots.
Up to a maximum of 5
1280x800 or 640x400
JPEG or 24-bit PNG (no alpha)
At least one is required
So far, so good. Normal images for normal screens, x2 for retina screens. But something went wrong, and Chrome Store just compresses all images to 640x400. And let's be honest, it looks terrible in 2022.
Given the availability and speed of the internet, it would be better if all users got 1280x800.
Simeon, Chrome Store team, let's do it 💪🙏