A Desktop is a DESK-TOP, meaning it sits on top of a desk, having a wireless keyboard is really pointless in my opinion unless you are using Mac Mini, or macbook pro, so Apple has given the new keyboard a useless feature, instead of adding useful ones like backlight and more importantly N-key rollover. Embarrassing.
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yes it does flicker, it has horrible PWM flicker, especially visible with the corner of your eye, this makes you get up and not sit at your computer at the very least, bigger effect is migraines, use slow motion recording on your iphone and move your phone super fast from left to right over the lit up keyboard, you will see the flickering as having black lines as demonstrated here
https://insider.razer.com/index.php?threads/keyboard-flickering.42941/