Sorry to say, your info is about 10 years out of date.
It is hard to buy anything but a tiny TV in 720P, and 4K is rapidly becoming mainstream.
That being said, even if you target 1080P TVs for viewing, 4K is still good to use for recording. Then, since you have extra resolution, you can shoot with a wider lens setting, and use that excess resolution as "buffer" that stabilization features in video editing software can use to "soak up" any un-smooth movement when filming.
720 TVs may be small, but that is the broadcast standard today. Keep in mind they are using $50,000 cameras with $30,000 lenses to broadcast that picture. Have you ever edited HD footage in a standard, run of the mill computer?
See I knew there were some FReepers who knew this stuff! Thanks.