It's actually a big change. One issue is that Apple may not approve you(for whatever reason) or keep you on the waitlist for weeks(happened to me). Not to mention that there won't be any competition. Next would be to make Safari and any browser running on osx accept only Apple tls certificates. That would be "awesome"! Finally Apple "secures" the internet
You don't need to be a time traveller to see that Apple will be the only one accepted as issuer. I really don't understand how people can feel comfortable with that. The next step is making the browsers trust only Apple's tls. At some point Apple will have to "obey the law" and ban any application that either violates certain country laws or its own TOS.
