[ddingus]

I suspect the core OS won't. There are always lots of reasons to run a machine that isn't online all the time.

What I do expect is features and applications linked to be dependent and associated with a subscription.

Couple that with improved security to discourage and outright prevent applications from being loaded outside of approved channels, similar to what Apple is doing* with it's security settings now, and it may become easier to just pay monthly than do your own thing.

*Preferences, security, "allow apps downloaded from..."