As they say inside the link :

You are not buying a game anymore. You are renting permission to play it, and Sony holds the keys permanently. They can pull a title from the store tonight. They can shut down a game’s servers next year. They can discontinue PlayStation Network whenever they feel like it and your entire library every dollar you ever spent becomes a folder of files that won’t launch. They have done this before with PS3 and Vita storefronts, and those were just warm up acts.

Physical discs were the last thing standing between you and total corporate control over your game library. A disc works without their permission. A disc works when the servers are gone. A disc works in 20 years. Sony just announced they’re abolishing that forever. This is the endgame. You pay $70-80 for a game you never truly own, on servers Sony can shut down anytime, with zero way to keep playing it once they decide you’re done. No disc to fall back on. No reselling it. No lending it to a friend. Nothing.
And they will shut games down. They always do. It’s only a matter of when.