3D capability isn’t the only area where Gemini 4 Carbon and Krypton massively improve upon Gemini 4 Argon.
Compared to Argon, the frontend and UI on Krypton are much better and more tasteful, and it's also more creative.
Gemini is improving fast lately, seems like they're now aiming for a major model release every month or so
1st video: Gemini Krypton (very early checkpoint)
2nd video: Gemini 4 Carbon
3rd video: Gemini 4 Argon