1080i vs 1080p...Why so much difference??

[J_WILL_GV]

Ok, so here is my beef, I have a PS3 and a native 108i sanyo LCD ( about 3 years old ). I notice quite often that when I go to a home electronics store and see the blu-rays playing on 1080p LCD's, the PQ is mind blowing...like better than reality..crisp, clear...I mean just astounding. Than we have my own LCD, while the PQ is def above DVD qualtiy, and very crisp, bright and clear...I am in no way confused at whether I am watching a movie or looking out a window at real life. I have the proper full HDMI 24k chords by sony made for the PS3...is there that much of a difference between 1080i and 1080p? Or is it just my tv

Thanks,
Josh