I would say the PO / 300 MC reissue is more of Omega's idea of a direct competitor to the Sub, as they tend to have a much more restrained, subtle style (and already feature the 8500 as you point out). The regular Seamaster such as the one you posted above has a more contemporary style that reminds me more of something like the TAG Heuer F1, or the next step up the ladder; it's more a casual watch for everyday wear and occupies that price point. So while they'll certainly keep it fresh by updating every couple of years, I don't think we'll see these with upscale movements for the foreseeable future - unless Omega decides to reposition itself, of course (like TAG did by going downmarket).
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