According to the links provided by CW I see no mention of it as X4*. It's SOANR Artist|Professional|Platinum.
 
Beepster calls what you install or upgrade a "build" and that is what you will update, a "build". 
 
 
* By way of reference some bakers used the term X4 and X5 (as an analogy) but it's not the product name as I see it.
 

I've already been saying this in a few threads that are titled X4. I think those dudes are let down that X4 never happened. All the threads that are titles "when is x4 going to be released" will become a curiosity to future people Googling Sonars history. Pirated copies of Sonar x4 will become collectibles. 
Scott's X4 Power Book listed on Amazon for the last 6 months too. 

Platinum... like the color of me and bapu's hair!
 
 
 
 
 
 
 

Just soan....

i liek it

But when will it be available?

Janu-wary 26th... maybe the 21st?
 
Maybe the 22nd when everyone is at NAMM?
 
 

How about X# which is already out I believe? That'd always be current wouldn't it? Or until we get to X## at least.

My vote is to call it Sonah...  (If anybody remembers that, LOL.)

CoteRotie
My vote is to call it Sonah...  (If anybody remembers that, LOL.)

It all goes crash in the loudspekah