1/ Android 4.x
2/ new Snapdragon S4 or Exynos 4 Quad or Tegra 3
3/ 1Gb min ram
4/ 16Gb on board + microSD slot
5/ qHD or 720p Res
6/ max 4.0″ screen
7/ easily unlockable boot loader
Nice to haves
1/ Ubuntu for Android
2/ 8MP camera, though these are fairly standard now.
3/ Better then 3G, though I live in NZ so not much use here, but could be when I travel.
4/ Curved glass screen like the Nexus S and Galaxy Nexus
Tegra 3 beats the S4 in a lot of things but I think the S4 is still a better design overall. May have to wait till for a little while before all my “must have” specs are met. By then the Exynos will have been out and properly benchmarked against the other two, and then we will see which is best.
The Ubuntu on android would be interesting, would be kind of cool to have a “full desktop experience” from a phone just by plugging it into some peripherals.