This is far far inferior to Wacom tech. Wacom uses no battery (read: light weight)... it does require the screen to have a special grid under it, and it requires you to license their patents, which is exactly why Apple didn't do it.
Wacom will give you more than just pressure too... tilt sensing and even roll/twist sensing. You can even have multiple pens that perform different functions, like an airbrush pen, paint pen, pencil pen, etc. These features are actually pretty important if you want to do digital art... pressure sensitivity is much less useful than tilt and rotation.
I'm not sure what features are available on the Note devices, but the technology supports it. This bluetooth thing is just a cheap hack by comparison. A heavy cheap hack.