After NBC's unprecedented high visibility decision to pull Conan O'Brien and reinstate Jay Leno as the host of the long-running Tonight Show in the middle of O'Brien's first season, Conan came out looking like the victim, and TBS quickly picked him up to become the host of a new late-night show, in an attempt to compete with NBC and ABC late night television programming. This ad was part of the campaign to get people excited for the new show and confirm the rumors that TBS had indeed created a show for Conan.
I love the simplicity of the ad and the way it conveys Conan's personality and humor without him even saying anything. The image of Conan, known for being tall and lanky, awkwardly trying to pose in a strong, serious pose that we could imagine Leno or Letterman doing in their commercials is very effective at many levels. Obviously it captures Conan's hip, absurd brand of humor that appeals generally to younger generations; this humor awkward comedy is unique to Conan or at least this what the ad wants us to think.
The ad also capitalizes on the sympathy that most people had for Conan after the ordeal with NBC. That Conan wants us to laugh at his expense just makes him more personable to us, and less like a talk-show host that we can't relate to. That the show is called simply "Conan" further emphasizes the approachable character of Conan, and stands in stark contrast to the other nightly programs. We are on a first name basis with him. Similarly, Conan's scruffy beard, which he did not have on the Tonight Show, makes him seem less like a talking head and differentiates him from the other clean-shaven hosts.
Symbolically, the ad shows us that Conan cannot be fit into the standard mold (or a chair); it embraces an outsider image of Conan in contrast to the other celebritized hosts. It violates the general ad format of the other late night shows that always show the different scenes from past episodes.
TBS is well aware that everyone was waiting to see what Conan would do in reaction to his embarrassing predicament and this ad served as the strong answer to that unspoken question. That so little is said just makes that this unusual, yet stylistic ad so much more striking and memorable.
However, I'm not sure that in the long run this ad was right decision for the show because Conan is so central to the ad. Conan is the show and there is obviously no "Conan" without him. As Conan goes, so goes the show. The personalities of the other hosts are not nearly so central to the show; just by looking at the history of the shows indicates that the hosts are replaceable without too much difference in viewing numbers. Because the other shows emphasize the celebrity guests who will be on rather than the host, I am still willing to watch the show to see the interviews even if I don't particularly like David Letterman, for example. However if I don't like Conan, I'm probably not going to watch the show, and this is something that appears to hurting them.