Cant figure out how the game view resolutions works... Help?

I would like to set my game resolution to 1280 * 720…
ive noticed that i can choose from several different devices and aspect ratio but none of them is 1280x720…
and even if i do decide to choose from these, when i use
print(Screen.height);
print(Screen.width);
to check the resolution it is never what stated
for example if i choose Tegra Tablet wide1024x600
i get something else.

i know using a script i can force it to 1280x720
but this way it wont stretch the game to fit to the device resolution
Can anyone help my understand how it works ?
Thanks !

The Unity “Game” panel gives you idea about what the game would look like when you run the .apk on the device having screen with resolution (aspect ratio) you choose. Whatever screen size you choose, that information is not built into the .apk file. “Game” panel is kind of preview of the game.

Screen.width and Screen.height return the native screen resolution of the device (number of pixels available) unless you set it to some other value.

You can find useful information about stretching in the following thread:

http://forum.unity3d.com/threads/62257-Force-Screen-Resolution-480x320