It's not the Tesla way to simply cram more batteries in a car like the Model 3. Instead, they use clever engineering to increase efficiency (see OctoValve). Also, the range of the Model 3 is very adequate, even if it managed to receive a range of 400mi with 100kWh (which I doubt they'd do as it would infringe of the sales of their highest margin vehicle), that really isn't much of a game changer for real world use. It would mostly be helpful for a select subset of road trippers, and those who live somewhere without a charging outlet. Meanwhile, the cost of the Model 3 would go up significantly...
My opinion, based on this being a direct screenshot of the MCU output and not a photo in an actual Model 3, is that someone flipped on the existing 100kWh flag we knew about months ago from green, or it's photoshopped. I don't believe Tesla will bother changing the battery in the Model 3 unless they design a significantly new type of cell/battery design that decreases weight or can accept a higher charge rate, which is what most folks should desire more so than range. My desire is to stop every 200mi and add 60% in 5 minutes, or sometime similar to a gas station experience. That will get people to switch...