[miniatureape]

If not a webpage I would be happy with it displaying a bitmap. Let me put in a URL and poll it with the dimensions as query param. I will handle the render and serve back whatever I want.

I could draw my calendar on the left, the weather in one corner and todo list in another.

[dmitrygr]

You can buy eInk price tags off eBay (7.4 inch price data brand, $25 each). I am releasing in a week or so, a cursory firmware for them that allows drawing on them in greyscale plus yellow any image you want, uploaded remotely. Quite cheap. Years of battery life.