What you have here is actually a Katauta or a half Sedoka where the line measures are 5-7-7, rather than the 5-7-5 of Haiku or Senryu (which differ only by topics). No matter what you call it, I like the pared down, tight structure, and the thoughtfulness of the the poem and the way that last line just floats there, a bit awkwardly, but totally in line with the theme.
Life is beautiful, but can anyone say that it is truly complete? This is such a great meditative thought and definitely fits the spirit of the Japanese styles.