It's not immediately obvious to me that the closed web will have anything good on it. People that want other people to see their stuff won't lock down who can visit, it seems like it's mainly for ad supported crap? Optimistically, the web will break apart into some AOL Disneyland Cable shit experience and an actual good internet whose participants are not just pretending to have engaging content so they can get ad views. I know that sounds too optimistic, what's the flaw in it? Google will use it's monopoly on a few things to push it, I'm happy to move away from gmail and I don't use Google search anyway. What other practical changes will there be?
Your online banking will stop working on your unapproved software, just like your baking app stopped working on your rooted/old Android phone some 3-5 years ago.