I'm really curious about technology behind the "Floating Touch" feature for Galaxy S4. For those who haven't heard about it, essentially what it does, is lets the device know when the finger is near the screen with, but not touching. You can see it in this video example:
The only thing I can think of some kind of high conductivity touch panel, which is very sensitive to any electrical impulses. Also, you can use your gloves with this phone. I think it's pretty damn amazing.
So what do you think? Maybe you have some links to articles about the tech behind all this, I would like to read about it.