I think it means that there are some RDNA2 features that the other next-gen consoles don't have. Are those features going to be really important and make a big difference? We don't really know, but one thing is certain; MS is not legally allowed to make such a statement if it wasn't true, and I'm 100% sure that the other console manufacturers would not just stay quiet if what was said wasn't true, even if it is just a technicality.

how does microsoft know that their consoles are the "only next gen systems to have full rdna2"? Don;t they all have license agreements of what they can discuss between each other and confidentiality?

Because MS knows that no other console runs DirectX :)

Ah ok, so just the usual PR stuff. 

haha i guess so.

But that doesn't mean Sony has the full feature set of RDNA 2, but I would imagine that Sony would have had the choice to include or exclude as they see fit. We do know for sure though that Cerny directly made reference to Mesh Shaders and a variant of Sampler Feedback. He however, made no reference to Variable Rate Shading or anything similar as far as I know.

Might not have understood my question, since you just repeated the statement. =p

Xbox Series X, PS5 and AMD's GPUs all have different RDNA2 solutions that have unique features that the others don't have.
And both Sony and MS developed RDNA2 together with AMD. So who gets to decide what a list of 'full features' means?

I guess it's just based on what AMD are using, because they're the only ones that call it RDNA2. PS5 and XSX call theirs RDNA2 based, because they're custom.

But the thing is, AMD's version is missing several features that PS5 has.
A PS5 engineer described it like this:

"More features, and one less."
I take it that means there's one feature that AMD are using in their GPUs now that PS5 is not. But PS5 has several more features that AMD doesn't.

MS may just be referring to DirectX Raytracing here, because DirectX is MS technology, so Sony use a different type of Raytracing.

Probably. (Although they still advertised Destiny when they weren't legally allowed to.) Just trying to figure out what it means.
But I'm guessing it's just based on what AMD use, because people will read it and think RDNA2 is a standard, rather than one of three different approaches that were co-developed alongside each other, for different systems.

Well ofcourse, they don't directx12, they have their own api, they have their own mesh shading tech and so on. I remember hearing mark cerny talking about something similar to VrS. But it's funny how in AMD's presentation they spoke about the features that will be in xbox consoles, and then showcased a ps5 exclusive Godfall. 

Support all the the features on showcase today, doesn't equate to support full feature set. Two very different statements.

I’m pretty sure Cerny mentioned Primitive Shader and not Mesh.

That would also explain why third party's are raving about the ps5 development tools calling it the best there has ever been. 

I'm gona agree with redgamingtech here and say that ps5 is more custom and Xbox is more of the shelf.  And it would make sense as ms wants to blend their console market with the pc. So it would be beneficial for it to be as close as possible.