1080p = 1920x1080 resolution, 1920x1080 per frame
1080i = 1920x1080 resolution, 1920x540 per frame (alternating, alot less bandwidth was designed for HDTV broadcasting at high res with lower bandwidth needs)
Now... can you make graphical resources that are interlaced? ... no, making two bitmaps with "blank" alternating lines actually takes more RAM/Storage than a single bitmap for example so noone will ever bother doing that lol. Also GPU's dont render interlaced images, you can't calculate AA correctly when you are missing every second line can you as another example. This means when a GPU renders a 1080i image is *has* to render a 1080p image and then the output is interlaced, this is the only way it *can* be done
You know what means? That means making a game 1080i native is just as stressfull on the GPU as a 1080p native application. (and its why we dont even get 1080i native high end games much less 1080p high end ones)
In fact if you show a still image at 1080i and 1080p... it would be completely impossible to tell the difference... impossible ;)
The 360 can do native 1080p rendering also as pointed out in the link article itself and by microsoft and by game developers (check annoucements of 1080p native games) and by the update that allowed it.... what else do you need to believe it folks? :)
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