In his CES keynote today, Comcast CEO Brian Roberts will outline several Comcast's initiatives (under the umbrella "Project Infinity") to stay competitive in the fast-changing video arena.

These include:

"Wideband"- New "wideband" broadband technology which allows much faster downloads (this is impressive, though was previously displayed at '07 National Cable Show). Wideband is aimed at blunting criticism that telcos' fiber networks have more capacity and faster speeds.

HD expansion - Plans for a 10-fold increase in the number of HD movies available in its VOD library to 3,000, with at least 6,000 total titles, including SD programming, eventually available. This is all meant to offset the widely held view that satellite and telco have surpassed cable in current HD offerings, a key value prop to millions of Americans now bringing home shiny new HD TV sets.

Fancast - Comcast's video portal will include 3,000 hours of streaming TV content, from NBC, Fox, CBS and others. These moves will help bring Fancast to parity with other syndicated partners of the networks which are themselves trying to proliferate their programs everywhere. Fancast will also allows remote scheduling of DVRs (both Comcast's and TiVo's), a feature that has been widely available at sites like TiVo.com and Yahoo for years now.

All of these actions are intended to help restore Comcast's reputation as the leading provider of entertainment programming, amid the swirl of changes that have enveloped the company. Despite its formidable size, Comcast is fighting competitive fires on virtually every front: fierce multichannel competition from satellite and telcos, rising expectations of HD content, consumer behavior shifts to broadband video consumption (premium and UGC) and place-shifting/time-shifting/device-shifting. The list goes on. Amid these changes, and with a slowing of the American economy, Wall Street has punished Comcast's stock price, cutting it in half in the last year.

While I applaud today's announcements, there is still one big strategic piece missing which Comcast has yet to comprehensively address: what are its plans to allow subscribers using its digital set-top boxes to seamlessly watch broadband video content as they do broadcast and cable programs?

As many of you know, I have been on a "broadband-to-the-TV" jag recently (see here, here and here) analyzing different options and their potential, or lack thereof. I continue to maintain that incumbents with boxes already in the home - mainly cable, satellite, telcos - are best-positioned to bridge the current divide between broadband and TV.

A breakthrough value proposition for Comcast would be allowing its subscribers to gain easy access on their TVs to YouTube, Break.com, Metacafe, NYTimes.com and all the others broadband sites that have surged in popularity. In theory, Comcast and other cable operators have always been about providing more video choices to subscribers. But the caveat has been those choices are only offered when Comcast makes a deal to carry these new channels. With broadband it's a wide open world. Any video provider - deal or no deal would gain access. This "openness" is a fundamental paradigm change for Comcast and other "walled garden" loyalists.

Surmounting this change to its business and cultural model are in fact Comcast's #1 strategic challenge. How to effectively respond to customers' broadband desires, while maintaining a robust economic and competitive model? When Brian Roberts, and others in the cable industry are finally ready to address the question of how they'll integrate broadband into their TV-based user experience, that will be a keynote well worth watching.