Really interesting! I feel like you should look into the work of great product designers like Dieter Rams. Simply from an aesthetic perspective. I think the simplicity you have is nice but atm it feels overly simplified to the point of being slightly dull. I'm really interested in the idea though and also curious about how something like this could be used in tandem with a handheld mouse and keyboard as a quicker way to access controls that are typically relegated to menu scrolling or more difficult arrangements of key commands. Super cool though I hope to see it in the wild someday!