If the iPhone 4 can shoot HD videos it stands to reason that I can sync HD videos on to it. So I'm wondering now that HD videos can go onto
TVs iPads & iPhones is there any reason to have a SD version and HD version of a movie?
I've converted most of my movies into both HD & SD (and a couple of things I bought from the iTunes store comes with both) and so I'm wondering if I might as well delete my SD content once I get the new iPhone 4.

I've converted most of my movies into both HD & SD (and a couple of things I bought from the iTunes store comes with both) and so I'm wondering if I might as well delete my SD content once I get the new iPhone 4.