What's your budget? I'd look for a big print for the wall; if you have a favorite movie you have ebough room for a big movie ad. I'd get a monitor arm to hold the monitors and free up desk space.

I'd put the PC on the floor to the left of the desk, clear up more space and still show off the lights.

Air plants are kind of fun, and break up the whiteness - maybe on the wall next to the window?
https://www.amazon.com/Wall-Planter-Succulent-Vertical-Bathroom/dp/B07Y5DRLJ8/?th=1

Where are your speakers? I like the Creative Pebble speakers, they're USB powered and cool looking, although they aren't very loud.

https://www.amazon.com/dp/B0791H74NT

What's that wall plug powering - is it powering your PC? I'd run wiremold or staple the cable to the floor, but I do structured cable for a living.

How about lighting? Philips makes some cool lights that go on the back of your monitor that are LED and programmable. They'd make a nice accent light on that back wall behind the PC.

We got rid of cork bulletin boards and have been using metal and small neodymium magnets. The possibilities are many, you could go for piece of sheet metal, add some patina to it and hang it, or buy something modern - they make magnetic white boards in a metal color that'd be nice.