I think his point is that it has not been confirmed to be a real final PCB. More of a 'leak' type information.
I think they may make an Ultra card at some point in time, once yields are decent. I really don't see why not if all current chips are being made with 512sps and some of them are getting disabled...
I do not think this is a requirement, though. Could be an indicator, of course... But probably is just a marketing trick. And a cool feature!
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