Did you watch the video? And how would you describe a 1080i broadcast that is not 'truly interlaced'? What's that mean?
Most are 1080i because it was cheaper to implement. And I would argue 'most are 1080i'. It's about a 50/50 split. Disney/ESPN/ABC/FOX/A&E/HIST are 720P. CBS and NBC are 1080i.
As for the bandwidth issue you can do a few things...go all IP/unicast and/or move to MPEG4. Both would require CPE upgrades which providers loathe.--
Rich. My Website