This explanation seems a bit too simple. And what about 720p? There are also several stations broadcasts in 720p, which gives a clearer image for sports or fast moving activities. You should also tell everyone that most HD Stations only Broadcast in 1080i. The 1080p images are strictly limited to Blu-ray DVD or gaming consoles (which are also blu-ray or similar type laser readers). Just thought this info would be helpful to anyone wanting to purchase a new flat screen TV/monitor.