A tablet-like touchscreen computer designed specifically for use in the kitchen, designed to mount on a fridge or cabinet. Inventories fridge and pantry, possibly with the aid of a barcode reader or camera to read UPCs. Connects via Wi-Fi to a recipe database, and attempts to find recipes based on fridge inventory, with full health statistics for each meal. (Oh, and a media player wouldn't hurt either.)

If the UI/UX was polished right, I think it could go very mainstream.