I'd say that there's a lot of hype around them and I find it scary since these technologies heavily rely on power hungry interaction elements.

In N800 times I remember a huge fight with UI designers about the single LED and the fact that it was going to be abused:

• far from optimal hw design would generate lot of CPU activity for blinking the LED
• the user was expected to be some sort of telegraph operator to tell one pattern from the other
• because of the low pass effect from the mechanics, patterns that on paper were significantly different were ending up to look like thery were all the same

So that was just a simple and apparently harmless LED; I wonder what will happen once we start dealing with stuff which actually _moves_ or is expected to light large screen surfaces - or both - hence requiring much more power.