What resolution is best to work on both, phones and tablets?... More and more phones are coming out with 1080p displays... I'm guessing something in 1080p, would look good on both phones and tablets... But what about phone with 720p, or even 480p resolutions... Will there be any distortions in the image, on something with a 720p, or 480p resolution... So what resolution has the best balance for all phone resolutions, and will also look good on a tablet... 720P or 1080p?