Based on Spencer's words, he'll release Xbox Two fall 2019 it seems. If Sony wants to release 2020, well they can I guess but MS waves the white flag further up in this E3 and now solelh focused on next gen. Can't wait to see more rumours end of fhe year.
I read that statement as the opposite. They're already gearing up for their 'wait for the more powerful box' shtick and the expect Sony to move first.
I don't think my point of view is more valid then yours though .