Hi,
Perhaps ... BUT
This is available in Insider program ... so register you and test ...
This already exist with multiple solutions :
... MinGW for ex. or "official Linux tools" from Microsoft or the long time know Cygwin (and X server Cygwin/X) ALL can change and modify access right and owner ...
For access right ... solution also exist :
Samba to get or set the correct access right can map any basic Micosoft flags to Linux flags, or partial A.C.L. with Linux A.C.L. or total by using (hidden in Linux but existing) Windows A.C.L.
MinGW or Cygwin also support windows access right ... and for BASH and tools ... generally it's enough ...
Do hesitate to test yourself ... to see if chmod and chown (your example works) ... do the job ... (sorry but they do it)
NTFS is supported ... but certainly out of some specific options ... BUT UID (corresponding to user ... Windows don't know internally user ... BUT UID with user value is only a name (like a DNS name is for TCPIP)) is managed correctly so user / access right are managed
BUT it's a RIGHT for each person to don't accept this as a reality ... the information is only ... for information ... no more and it's true as any news ... when confirmed by real tools.
If you are a "Linux pure player" ... test it and return experience ... good or bad ... I have tested bash and current Linux tools ... also ssh and some others tools ... but my advice is only one and I don't think to have do ALL and tested ALL ... just a small small part ...
POSIX is only a very small part of potential problem ... and mapping solutions already exist BEFORE any Microsoft announcement.
I have tests multiple bash and lot run ... some require adaptation ... but it's when they require specific interface (for ex. W.M.I.) this require partial "specific to Windows" adaptation ...
I am not a Microsoft FAN ... but I am always curious (after tests) about new announce ... but I don't dream ... just know (so also limitations) what is possible to do ...
So you can reject it (it's 100% your right) but Hoax is just false ... it's not the program your dream to have ... but this don't put in trash all others solutions (even limited)
... so, please, return to the basic : did you test it ... because for a hoax ... it's an existing one ... or if you don't trust Microsoft ... try others solutions existing from long time
Philippe.