There's been a lot of talk about Pencil. Let's sketch out a couple quick comparisons to some other styling styluses.

First: the Microsoft Surface Pen (from a Surface Pro 4).

Second: The original "iPad Pencil" by 53. It works specifically with their Paper app, and has a lot of the same features as the new Apple Pencil.

Also, it's really easy to open up and get the battery out.

Double-also, it has an eraser.