TiVo still intends to have a retail Tru2way Series 4 but both the Tru2way DVR and TiVo Series 4 details and specs are still being finalized. It will probably be a while.
Old news but lest we forget:
1) Recent tweaks to tru2way, for example, allow for some forthcoming DVRs from TiVo Inc. to toggle between its navigation system and the operator's native guide.
2) In the FCC filing this week, TiVo notes that cable has agreed to make a few "clarifications or adjustments" to the OpenCable Application Platform (OCAP) in ways TiVo believes are necessary to build a "viable retail DVR" powered by the CableLabs-specified middleware.
Those "adjustments" will enable TiVo boxes with OCAP to run in two modes:
TiVo Mode: In addition to displaying all the operator's linear channels (and those offered via switched digital video techniques), this mode will preserve the TiVo user interface and tap into the box's full DVR functionality.
Cable Mode: Running OCAP, this mode will give customers access to general programming services and other MSO-supplied set-top applications via the cable operator's native user interface, and toggle off the device's DVR functions.
They obviously have a lot to work out. I wouldn't expect anything until 2010.