They're testing to see the interest in a Nintendo Switch port. Based on the hype in my feeds, there's a strong desire. However, Blizzard spoke to The Verge and said they have nothing to announce at this time.
"Those lights, combined with the polygamous Nazi mushrooms, will mess you up."
"Tuning me out doesn't magically change the design or implementation of said design. Though, that'd be neat if it did." -schild