I think Sony handled this very well. Announcements in the usual pre-show usually get overshadowed by the big hitters, so a countdown like this gives each reveal a little more publicity, a little more exposure.
This also clears the way for Sony E3 to strictly focus on the thing people most want: the huge AAA games, without wasting their time on VR or indies.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.