Would the sony ps4 now support ntfs and mkv files?
NTFS is unlikely seeing as it is a proprietary Microsoft file system.
As for MKV video files... no information is yet available, as far as I know.
None of those details are known.
If you want to play MKV files, just use MKV2VOB.
Its fast, and allows use in any player. VOB is the format that all disc based video is used so its universally compatible, for the most part.
Not true about NTFS being a proprietary Microsoft format. Fat32 is a MS invention, long ago adopted by IT industry as a whole since the days it was first used in MS-DOS. MS has rights to thier implementation of the standard within their software, but others have written free, open code to read/write Fat32. Same has been done with NTFS. Just do a query on "NTFS Linux". Many other device manufactures support NTFS on their TVs & Blu-Ray players while Sony chooses not to. In fact the XBox 360 only supported Fat32 in the beginning.
The truth is that NTFS is a very mature and commonly supported standard. It is a "modern" file system. It supports files over 4GB, which is going to make it impossible to encode a full length hi-def movie and store it on a Fat32 device. Sony is just way behind the rest of the industry on this on many of their products. Just like they stuck with the Sony Memory Stick for a long time when everyone else was standardizing on USB, SD & Micro-SD.
Not sure if the PS4 supports NTFS or not, but if it doesn't shame on Sony. And no whining about it being a Microsoft standard -- not a valid excuse.