There still seems to be some confusion about the difference between 1080i and 1080p. Both are 1,920x1,080 resolution. Both have 2,073,600 pixels. From one perspective, 1080i is actually greater than Blu-ray. And, you can't even get a full 1080p/60 source (other than a PC).

True, 1080i and 1080p aren't the same thing, but they are the same resolution. Let the argument commence...

Read more at source:
1080i and 1080p are the same resolution | TV and Home Theater - CNET Reviews

To put it simply, they are both the same resolution (i.e. 1080 lines), but the method of display is different. 1080i (interlaced) is displayed in the same way as conventional TVs, in other words the odd lines are scanned/displayed from the top of the screen to the bottom and then the even lines are scanned/displayed in the same way, repeating ad-infinitum. Thus, for each complete frame there are 2 passes. 1080p (progressive) scans/displays all lines from top to bottom in a single pass.