TiVo functionality pushed back to 2013.
In a Nintendo direct announcement, TVii was announced as launching December 20, but without a few components.
The Wii U can already provide basic TV control, but TVii is designed to pull together several different content types together with the Wii U's second screen control and experience. The delay of TiVo DVR access (control integration with a TiVo box) and Netflix integration (separate from the already released Wii U Netflix app) seems to extend to January. Nintendo has been sporadically bringing Wii U features online since its launch, and a time quotient for the sub-feature delay time can only be speculation.
Along with pulling together cable, satellite and streaming service content, TVii is marketed as providing an interface far beyond the current basic channel up/down number pad operation.