It’s only five minutes long, and probably something that JCStaff threw together in a weekend to make fun of Kadokawa. I support them in this endevor, but must admit that I’d watch puppy Ami any day of the week. On the other hand, it just reminds me how awesome of a job JCStaff does with being downright adorable when they want to. Maybe one day we’ll get that proper Mahoraba ending or a second season of Potemayo.
Although thinking about Haruhi-chan is natural in today's context, such extras existed long before, for example in To Heart.