Some automotive journalists have already been fortunate enough to get some hands on time with the new 992. Carfection just uploaded these very detailed look at the new generation and what you can expect from the car both inside and out.
Not a fan of how much bigger the 911 has gotten this time around and continues to as the years go on. If it wasn't for the great power to weight ratio Porsche maintains then I would lose all interest and stick to older generations.
In terms of dimensions very little has changed from the 991.2 to the 992. All we are seeing is slightly wider fenders, to increased track widths on the front and rear, for better grip and turn in. Its got the exact same wheelbase and overall length has increased by an inch..