What does this have to do with the topic? Apple already owns apple.com and could do this if they wanted. This thread is about them wanting to own .apple (no .com). So they could offer "yourname@mail.apple" instead, but apple.com is not the topic of discussion here.
tbh, I think some of these TLDs offers some opportunities, but in general will just add to confusion.
I'm not seeing how iCloud.apple will be that much more helpful, people will still type in iCloud.com and .com/.net/.org will still be highly sought after TLDs