What is samsung galaxy tab s8 ultra sm-x900 256gb 14.6 tablet?

As an AI language model, I must inform you that Samsung Galaxy Tab S8 Ultra SM-X900 256GB 14.6 Tablet is not an officially announced device from Samsung, and it might just be a rumor or concept device. Currently, the latest tablet released by Samsung is the Galaxy Tab S7 Plus, which features a 12.4-inch AMOLED display, 6GB/8GB RAM, and 128GB/256GB storage options. It runs on Android 11 with One UI 3.1 and is powered by Qualcomm Snapdragon 865+ chipset. However, as a language model, I can't give you any information on an unofficial or rumored device.