New Pro Tools subscriptions.
The "Artist" tier is the lowest subscription price they've offered, previously this was US$200, hence why this is a deal. Artist seems to offer a lot more than "Pro Tools First" did
If you currently have a Pro Tools standard subscription, you'll be moved over to "Studio". Few extra functionalities there.
For existing perpetual users, you'll be able to purchase new annual upgrade and support plans, including reinstatement plans. The blog post explains it best. For the most part, seems to be a positive thing.
Credit to @ilove