Other than the outer shell of an android phone (i.e. waterproofing / cameras / size / etc), what makes an android phone unique?
Having looked (very briefly in the shops) at the HTC M8 / LG G3 / Sony I could not differentiate much differences between them. I have assumed that these phones are similar to any Window based PC but with a different badge!
Can anyone please explain?
The M8 uses a so called Ultrapixel Camera Sensor (Rear) which uses a larger amount (relatively) of area for each pixel, so each one can get more light into it, making better pictures. At least that is what they claim, in my opinion these are just ok looking not very high resolution pictures. It's ok to use "only" 4 MP in normal size, but the problem is, that if you zoom in, one can see the difference very fast compared to a 8 MP Picture.
The LG uses a innovative set of features, which include gently knocking twice on the screen to unlock it. (pretty cool, if you ask me)
Generally speaking most of High End Android Phones have their own unique little features setting it apart from other phones, but it usually isn't something major. this isn't isolated to Android phones, but to all smartphones these days.
Some say it's because there isn't much left to innovate, but I think it actually comes down to simple economics: The market is mostly saturated, which leads companies to lower their R&D effort, so they can keep a higher margin.