video used by Hollywood is 4096 scan line, so 1080 will be noticeable as a slightly 'blurry' picture, however it won't be as gross as VHS 483 lines. pay very close attention to be sure every shot is in sharp focus because every defect will be magnified on the big screen. since your camera most likely uses AVCHD codec, avoid all camera moves at all costs, invest in a solid tripod at the least. Also avoid any scene with significant movement, AVCHD sucks at motion resolution. if you are fortunate to have an MP2 camera, then you will have more lattitude with motion. Editing AVCHD needs to be done on a first class (as in expensive) software platform that is because with a fixed GOF = 8, you have to be very careful to avoid cutting on an "I" frame. If music is involved, keep the songs short or you will lose lipsync quickly. you will have a major challenge using a consumer camera for big screen production.