Erin's a freaking monster with how she's holding that marker.
I could have gone with the holo-displays scifi seems to love lately but I like that old analogue feel. Plus, I feel the fancy stuff is sometimes unnecessary, like see-through displays gotta be killer for eye strain, and a marker on a window will keep going even if you're running on low power.
I did just finish watching Archer 1999 and the backgrounds there really made me feel like I gotta step up my button & switch game.