16:9 Notebook Screens?

Transition Cat asks: "Is there any demand for longer notebook computers? With laptops as light and thin as they are, it seems that a laptop with the screen stretched out to 16:9 would still be portable. The longer dimensions would also permit room for a numeric keypad. Good as a portable DVD player (with better stereo effect since the speakers could be farther apart), good for spreadsheets, good for displaying a second browser window, etc. Good idea? Nightmare for Windows drivers? Does anyone want anything like this?"