I think the walker case would have been a major symbol of recognition for Amiga. Either that or best known for the non-open standard case where you cant fit standard cards into.. lol. But then again it could be looked at being ahead of its time? People modding their cases to resemble all sorts of things have only became mainstream from 2000 onwards me thinks.
The SGI O2 was released around the same time the Walker was being developed, maybe that was the start of rethinking case design.