Yes, Xbox is getting the 1.4 release, but as far as I know, I think the client that was pushed out to PC and Mac today should bring the PC / Mac version to the same level as the current Xbox Preview build. I don't think they rolled out a new Xbox build today. Any Xbox One owners on this thread can confirm / deny?
Any update to the Xbox One build has to be approved by Microsoft before it can be rolled out - FD can't just decide on their own to push one out.
For example, Xbox already had CQC about a month ago, whereas the PC build is just getting it now.
Hence, unless I'm wrong and new Xbox preview build was also pushed out today, those Xbox One fixes listed in this changelog must have been already in the Xbox build and somehow dormant until the server side updates were made, which also must mean that we are in the same Beta galaxy as Xbox One customers (for the first time)?