I think the conflicts of opinion are whether you can define and "updated" MacPro to be the same as "New" MacPro.
Not really. Robains post to which goMac responded ends with "RIP Mac Pro". Previously in this thread he has referenced it has been a "vapor" hardware and inferred as canceled. Clearly that isn't about update or upgrade distinctions but about EOL. goMac referenced rumor source basically says the "Mac Pro won't be canceled" (unequivocally that there would be a new Mac Pro , no dates just essentially that it is not canceled). goMac said there would be an update.
I used the word upgrade which is probably a stretch. but updated certainly fits with what did in fact happen. To tap dance in and say this isn't an update is a farce. The "new" aspect is moot because robains was busy dancing the "ding dong the Mac Pro is dead" jig; which it is not. The misdirect is to turn it into "well it isn't 'new' new" now.
The majority of people around here, as well as Apple, have come to grips with the idea that the latest "update" to the MacPro line does not in fact warrant the "New" tag.
While I get the technical definition you are trying to place on "new" here, here a snapshot from the my dictionary app on the Mac.
" new
adjective
1. not existing before; made, introduced, or discovered recently or now for the first time ...
2. already existing but seen, experienced, or acquired recently or now for the first time ... "
The fact is the "new" is being nuanced here into what is normally tagged in IT infrastructure transitions as an 'upgrade'. But in fact the above is pretty close to how he actual usage in the "it is dead, there will be no more Mac Pro" context. This configurations didn't exist before as Apple products, they were recently introduced, and many folks recently discovered that they predictions ( "canceled" , "revolutionary new TB enhanced , etc. ) were offbase. If talking about what the word actually means it really isn't a matter whether the word fits; it does.
What this qualified "new" , and debate as to use another tag, is really a rationalization as to why it should not be considered as something to buy.