A great thank-you note should accomplish a few things that this note--while still nice--does not. It should:
Help the interviewer consider you more strongly by showing your passion
Improve an answer to a question you may not have nailed
Answer a question the interviewer posed and didn't leave time to address
Provide deeper follow-up to a point you may have made
Provide another example of how you can help the organization based on something mentioned during the interview
Of course, one letter can't (and shouldn't try to) address all five points. But even though thank-you notes should be relatively short, the content or "meat" of them still takes precedence over brevity. Generally, when I get a pleasant but generic thank you letter like the one above, I immediately file it in the trash. It basically wasted my time. However, if a letter adds information about the candidate, it gets stapled to his or her resume and cover letter and kept for future consideration.
Length is important, though. A few well-written paragraphs should suffice--but no more than one page. With that in mind, only one or two points can be handled substantively. Pick the one that's most pertinent and then use the other bulleted goals for follow-up touch points in subsequent correspondence in a week or two.