I collect movies since VHS ages, it's just that i happen to start collecting Blu-ray steelbooks half a year ago, we all started at one point. No chance for me to get the zavvi 'From Dusk Till Dawn' steelbook since it was sold out when i started to collect steelbooks. The existing 'From Dusk Till Dawn' steelbooks in germany are cut, an absolute no go for me. I'm happy i'll get the chance to own this movie now as a steelbook edition, uncut. But some people here are sitting on such a high horse "What? You don't collect steelbooks since day 1? How barbaric, you're not a real collecter".
Even for people who own the zavvi steelbook, the upcoming german edition could be interesting for them as well, it might get a neat new art.
It's definitely not a "completely irrelevant" release, quite the opposite, a new steelbook edition of an awesome movie.
I mean by your logic, no one should care for the new releases of 'Ironman','Captain America' etc. steelbooks, because "real film collecters" already own them, right?