The winner will be the company who makes a deal with all the other companies and creates a “product” that allows you to bundle all the subscriptions, which is what Apple should be trying hard to do since they have several of the most popular streaming devices on the market (ie iphone, iPad and ATV).
If by "bundling" you mean providing a single interface to use across the various subscriptions, that's exactly what Apple is trying to do. You subscribe to the various streaming services, and view it all through the Apple TV app. You use Siri to search for the program you want, or to find something that you might like based on what you've watched before. You get suggestions based on what you like or you browse the content freely.
So Apple Wins!
Except... Some services work better than others under this system. Hulu for example has profiles. Disney+ will, too. It really upsets the seamless integration when you search for content across all services and then have to identify which profile to use for each. Apple TV has optional parental controls that require a password for some content or even some services.
And also except... Other services also want to be the home for your user interface. You can subscribe to HBO and other services through Hulu, or Amazon Prime.
Now if you mean bundling as in paying one price (say, $50 a month) and getting all (or most) of the services with only one charge to your credit card instead of having to pay more than that to subscribe to the services individually, I'm sure that's coming, too. Sort of like buying the biggest cable package with 250+ channels, rather than the smallest package that only has 57.
Subscribing to all the services as a bundle might seem like a great deal, but you end up with more content coming at you each month than you can watch in a month. And if you pick and choose the shows you like from the various services, it's likely that you'll go some months without watching anything from many of the services included in your bundle.
Many people will still prefer to subscribe to two or three services, and occasionally drop one of them so they can add another service that has a show they're interested in (while staying within a certain monthly total price). Some will subscribe to only one service at a time, bingeing until they are bored, and then switching to another. These would be more frugal approaches, but the downside of watching The Mandalorian months after everyone else is that no one is going to be able to keep the big canonical spoiler finale to themselves.
