I picked up my 2021 GT AWD Blue Ext/Sand Interior this past Saturday (Massachusetts). Just got off a 2017 lease that I extended 6 months (pandemic related and also to get a 2021).
I can confirm these new features:
-10.3" Wide screen LCD is Non Touch, resolution is crisp, esp the 360 Camera
-Latest Gen Mazda Connect
-Boots really fast and screen response is super fast
-New graphics on the Driver screens, middle LCD is adjustable
-Paddle Shifters
-360 Camera is very crisp, and has guidelines
(nice feature is if I drive close to an object in front, I get a loud beep and the front Camera turns on)
-Hands Free Liftgate
-Apple CarPlay / Android Auto standard and works very well
-Third Row USB Ports
-Wireless Charging Pad
-New MyMazda App fore remote start, lock/unlock doors, remote hazards/horn, Vehicle status (Fuel remaining, odometer, door(s) unlocked, locked, app notifications, etc)
-Not 100% sure of wheels or grille changes, or exhaust tips - (may be subtle)
Will post some pics on next posting