It seemed a shame to waste all that space and resolution. I've been playing the Theatre Mode XML file again (based on MusicBee's Cover List theme)...
View attachment 410633
Added...
Second line with artist and album to 'Up Next' tracks - I tend to play a whole album, but sometimes I don't.
Increased font size for track title and put it on it's own line in 'Now Playing' section
Added file extension, bit depth and sample rate on second line (you have to use a virtual tag to do this in MusicBee as these properties are not exposed directly to the Theatre Mode interface).
Tweaked a few other elements such as Time and Track duration, the buttons for Artist Info, Lyrics and Now Playing Assistant and the Close button.
I've attached a ZIPped copy of the file if anyone is interested in taking a look. The XML file goes in %USERPROFILE%\AppData\Roaming\MusicBee\Plugins\TheaterMode.List, you should then see 'Cover List (2K)' in the list of Theater Mode skins.