On Facebook apps for Windows 8/RT is there really a need for them?

Anyone can post the main differences between the Facebook web page and the App on the iPad or other platforms? To me the web page works a lot better on my Surface RT than the Android app, I will say that the web page works 90% on Windows RT besides most games, everything else from updating your profile, uploading albums, even watching videos and playing embedded sound tracks work as expected, The experience on an X86 tablet is closer to 100% as even games like Farmville 2 can be played with touch controls. Anyone can share its use case to justify the need for an app?