Which is better for viewing middle-of-the-road non-HD programming. 1080i or 1080p on a significant LCD flat panal TV?
Answers: Non-HD programming (SDTV) is broacast surrounded by 480i, so any LCD TV with a local resolution greater than that is going to process the model to fit, and it will look bad. It's sort of resembling blowing up a digital photo at scale factor of say 150% or 225%--the resulting print is pixelated because your screen is trying to divide color information between pixels. Add within the complexity of motion on your TV and you have a recipe for one doomed to failure viewing experience.
LCD screens cannot display interlaced video, so adjectives "i" signals get converted to "p" by your TV set. Most LCD TVs labeled 1080i are in reality a marketing trick. This means they're dexterous of receiving a 1080i signal, but they cannot display a true 1080-line picture. Usually they own 768 lines, and they process your signal (from whatever source) to 720p display resolution. Your choice is not between 1080i and 1080p, it's between LCD TVs near 768 lines or 1080 lines, respectively. Knowing that, the difference is academic--do you want more lines of resolution? The benefits come with peak size and viewing distance (see the linked chart for more detail) but SDTV (480i) signals will look purely as bad on any one.
Here's a bit of bonus information: 1080i broadcast signals are almost all derived from 1080p24 video sources, so the conversion from 1080i broadcast signal to 1080p display will be practically flawless. This is not true for sources film in 1080i60 (sports and some others), but the video processing is still comparatively good, and it take a discerning eye to tell the difference between 1080p24 and 1080i60 sources on a 1080p display.
To sum up: any 480i signal will look doomed to failure on an LCD screen larger than in the region of 7" and it gets worse the bigger you travel. If you've got the money and you're thought spendy, pop for the 1080p screen, and you'll be adjectives set for when you decide to turn HD (or if your cable company eliminates SDTV programming). If you plan to examine DVDs on your new blind, definitely look at the Oppo upconverting DVD players--best rap for the buck, IMHO. Cheers!
1080p is slightly better especially for watching fast pace sports. But unless the tv broadcaster, transmits in that resolution at adjectives times i suspect it may be lower resolution HD maybe 720i. The 1080p would be better though!!
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