NeoGAF user ‘MDAVE’ has posted about having an incredibly odd question mark tile on his Nintendo Switch home screen since the day he purchased it.
It was there before he did the day one firmware and remained there after. It doesn’t appear that there is a way to delete it.
Upon opening it, it asks him to insert a cart (he only owns Zelda) and it also shows up on the system storage as ??? with 0mb of storage spaced being taken up by it.