Teams are now 5v5, Tank role now limited to one. Tanks are gaining new abilities, and the goal is to transition them to a more "brawler" role rather than just being about shields and defending.
New maps include New York, Monte Carlo, Rio, Rome, Toronto
Ability changes include Mei's blaster no longer freezing people completely, and Winston getting an alt fire where he shoots out a bolt of lightning.
Other stuff that's already been known was shown off too, like the hero design changes, the new Pushing robot game type, Supports now having passive healing, etc.
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Okay, I rolled a 14. What's that mean? Hsu That you're a cheater. This is a 12-sided die. Chan