Roblox is introducing 4D generation, powered by its Cube Foundation Model, which adds interactivity to 3D objects. This technology allows players to generate functional objects like cars that can be driven using simple text prompts. Developers are already seeing increased player engagement and playtime with this feature. The system uses "schemas" to define object parts and behaviors, enabling dynamic functionality. Roblox plans to expand this to generate entire scenes and more complex interactive elements through natural language prompts.