This is brilliant. Create a Key and Wallet Cabinet: Imagine never losing your keys again! Kristin at The Hunted Interior created a shallow cabinet on the side of her corner kitchen cabinet for exactly that purpose.
SIDE PANTRY: If you have walk-through areas in your kitchen, this could be a great idea for a small pantry, small dishes/glasses, or even small appliances. There are many possibilities with this idea. Add this to end of new pantry remodel.
Built-in corner cabinet used as a drop zone / message center - include lower drawer storage for charging things and/or close off lower (counter height) shelf for charging things - open upper storage w/ baskets to hide clutter or closed upper storage?