I've already gotten burn in from other apps so whenever my Galaxy S Super AMOLED screen shows greys, it's all kinds of crazy. But I agree on making the buttons transparent, moving or just activated on touch like the zoom and compass buttons.
I've modified my screen colours to highlight roads, so I expect even more burn-in from having bright yellow and white roads against a dark grey background.
But this phone only has a few more months before the contract is up, and I'm jumping ship to something newer on a different carrier, so I am not sweating the details.
AM for Baldwin
-Mobile Cos., AL // Grenada-LeFlore-Carroll Cos., MS // Escambia-Santa Rosa Cos., FL // CM for the USAHTC Droid DNA (Android 4.2.2) on Verizon Wireless