Lion About full screen app

guys i like this option so much , but i see its still missing
when i open an folder and i want to make it full screen for some reason still i can't

Finder is not a full-screen app.

also the app store u can't use it full screen , what if i want to use this windows with full screen

Buy a Windows machine?

The Mac has never been a use-all-apps-fullscreen environment.

i hate the stupid windows i know friend , i use mac for years ,but it will be useful if they did aahh np

Full screen app support is a feature that developers have to implement - it is not automatically inherited by each app. If the app doesn't have the full screen icon in the top right hand corner, the developer hasn't implemented it as a feature.