news NVIDIA RTX and LTX-2: 4K AI Video Generation Locally January 6, 2026 · 5 min read NVIDIA announces major upgrades at CES 2026: LTX-2 open model enables 20-second 4K video generation locally, ComfyUI gets 3x faster with RTX optimizations. NVIDIAAI VideoLTX-2 ComfyUIRTXCES 2026Local AI +4