Stick with optimising Android to work properly on the phones currently out there rather than building a phone which has the potential to actually run it correctly.
If iOS6 will still work on an iPhone 3GS its not unreasonable to expect the latest Android flavour to work on the HTC Desire, except it won't.
I can see exactly where this trend is going.
Next year Samsung will release a phone with a 6" screen. Fans of Samsung will proclaim that 5" was far too small to do any real work on and that 6" is the perfect size and still fits in trenchcoat pockets so it's still a phone.
The iPhone 5S will look exactly the same as the 5, has faster internals, and perhaps an upgraded camera. Apple fans will go out in droves to buy the latest and greatest from Apple.
In five years time, however, Samsung will release a 32" Galaxy S17 with 64 cores. Fans of Samsung will buy in their droves, proclaiming that last years 24" model was far too small to do any real work and that 32" is the perfect size. It still fits through doors so it's still a phone.
This is the year that Apple announces the iPhone 7S. It's 9" tall and still the same width. Third party trouser manufacturers license the design from Apple to create trousers with pockets on the shins suitable for the 7S.
Google will continue to use LG as the Nexus manufacturer, and integrate Google Goggles with Android. Having long since run out of food terminologies, they moved on to Big Cats. Android 8.4 "Mountain Lion" is released. 8.4.5 is specifically for the Goggles, while 8.4.3 is for phones and 8.4.6 for tablets. The nation becomes awash with Geordi La Forge impersonators talking to themselves on the streets.
Nokia build the Lumia 1000 L and Lumia 1000 R. The L is for left handed people only, and the R is for right handed people. If people buy the wrong phone it is impossible to use or see.
Food is available on the Google Play store, but because it's still "unfiltered", the human race is being brought down with killer illnesses because the "food looked safe" and they ignored the popup telling them that the app was asking for permission to poison them upon first launch.
The App Store also sees changes. Food is available, but only Vegetarian options. This is because Apple's "no nudity" option disallows any.......
Sorry... what were we talking about again?