It's described on the Wikipedia page because the creator of the antenna put it there in Feb 2009.
The E-Z-O section has subsequently been removed and re-added several times.
- Jan 2014, it was removed by an anonymous user with the explanation: "False claim to fame because the EZO variation is nothing but a variation on a coaxial loop antenna with reflector and directors"
- Jun 2018 The section as restored by a user Enix150 without any explanation.
- Feb 27, 2019 (shortly after you posted this question) The section is removed again by an anonymous user.
In spite of its humble inception, this could be the biggest improvement in antenna design in over 50 years!
The site appears to be authored by N8PPQ, and the domain registration and FCC database corroborate the authenticity of the author.
A circular versus square element is only minorly significant, electrically. Most of the visible lines are nonconductive support structure, allowing the elements themselves to be flexible. ezoantennas.com explains:
The idea came after a Scouting event, and was inspired by the way tent design has changed, with flexible tubes replacing ridged [sic] poles.
This is an interesting idea in construction technique, but not as revolutionary as the author claims. I don't believe the antenna is unique enough to merit inclusion in Wikipedia.