Judging by the lack of updates of any kind to Match since 2012, I think it will remain isolated from the music service.
I pay for it because I have 23,000 local songs and I need to be able to access them anywhere. But I am actually pretty disappointed with how Apple has ignored Match - it needs a lot of bug fixes in the iTunes department.
I'm hoping this is a sign that they will somehow roll it into Apple Music. Maybe give a longer trial to Match subscribers or something of that sort. I'm strongly inclined to switch to Apple Music depending on what features it has. At the end of the day, it will save me the time of finding a download for the song I want, then adding it into iTunes for the sole purpose of "scanning it" with Match.