NVIDIA recently applied for a trademark on the word "Tegra" and according to X-bit Labs this is very likely the name of a new major product from the graphics chip maker. It could be the name of NVIDIA's and VIA's mobile computing platform, a new specialized platform, the name of a new GPU or sometimes completely else. It's all just speculation, NVIDIA usually doesn't talk about upcoming products so we'll have to wait a bit longer to see what Tegra will be.
Nvidia recently applied for "Tegra" trademark with the U.S. patent and trademark office, but did not disclose any details about the product. However, there are various signs which indicate that Tegra will be a major product for Nvidia, the company which is not known for registering multitude of trademarks that are not eventually used.
The description of Nvidia Tegra at the U.S. patent and trademark office is short "G & S: Integrated circuits" and does not provide any details about the forthcoming product. It is not clear whether Tegra is Nvidia’s and Via Technologies’ mobile computing platform, a new specialized platform like Tesla, a new name on the market of discrete graphics processing units (GPUs) or a completely new multimedia chip from the graphics giant.