seen the omnia and using the omnia giving a totally different feeling, actually many phone without a portector will vulnerable to scratches, name me a phone that doesn't scratches without using extra protection. but to tell the truth..omnia very tough, drop my phone few times but still work perfectly like always.

using a cheap screen portector would be enough to give ample protection to the screen, and its better to use higher quality though.

theres a lot of alternative to protect the phone,
1. using book type leather pouch (im using this)
2. slide in pouch
3. ZAGG full set that cover the whole phone
4. flip hard leather case (the most expensive luxury accessories)
5. crystal case AKA "plastic hard cover"

ZAGG probably the best because its like wearing nothing..im using that one last time (for my other phone)

With a screen size of 3.2 inches and 400X240 pixels you can hardly see a single pixel. Unless the video source is of high resolution 720 or 1080 lines, which I don't think PPC media player is capable of playing, you will not notice any difference even if the screen is VGA ,ie 800X480.