My main idea when saying developer phone might have been somewhat lost in translation. Im not a native english speaker so allow me to explain what i meant ^_^
Imagine you wanted to develop a game on PC. Your rig is 5 years old and have outdated hardware. Sure you would be able to make a game out of that, that could run on most computers, but you wouldn't be able to add that little extra to it, like some awesome graphic effects or a couple of extra bots to the screen, due to your PC being too old.
Now, that PC isn't a PC, it's a cellphone. That's basically what i meant when i said developer phone ^_^
Also, the more powerful something is, the more you can play around with it