Why 16:9 is the best ratio for Windows tablets...

It's the best aspect ratio for snapview. 4:3 just won't work with this kind of functionality. Summed up in a couple of screenshots... Gmidqkr_medium

via i.imgur.com

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via i.imgur.com

This may change when windows 8.1 is released, but you will only be able to snapview 50/50 which demands too much screen real estate for secondary apps.