You can preorder it now for $399 at BHphoto and Adorama. And those are the specs:
Shoot and record more of what you love without changing cards with this high-capacity 1TB memory card that supplies the space you need for capturing all the action. Designed for your mid-range DSLR, HD camcorder, or 3D camera, the Lexar Professional 633x SDXC UHS-I card lets you quickly capture, and transfer high-quality photos and stunning 1080p full-HD, 3D, and 4K video, with read speeds of up to 633x (95MB/s). This Class 10 card leverages UHS-I technology to deliver high-speed performance to get the shot you want, while providing the reliability you need,