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Ok I found out what FSR is: AMD FidelityFX™ Super Resolution (FSR) uses cutting-edge upscaling technologies to help boost your framerates in select titles.

Nice, but what does it mean?

I am happy with my Epson consumer device, it works out of the box.

Just be aware what you install. Check the developer name and the whole path.
Some apps on F-Droid are limited for example but you can download the full featured app from Github. Later updates are anyhow cryptographically signed.

Now imagine what current generation spy satellites can already do.