All 3 yup. SNY just recently got picked up on a bunch of the streaming sites. MSG is the hold-out on some, but considering they are owned by Cablevision, you can understand why they are not jumping on so quick. Only thing Direct TV Now doesn't have is DVR, but has everything On Demand. Playstation Vue does and I would probably pick Vue over DirectTV, but Vue is missing MSG. Gotta have that, haha. Also, any of these you just cancel. So if Vue gets MSG, I would probably go over there right away, as they are a few dollars cheaper.
However, if you got a good friend that does have MSG, see if you can borrow their log-in and use MSG GO App. Think you can be logged in to almost 3-4 computers at once for that.