Liu probably picked this keyboard because he knows that a large number of iPad users are professional musicians whose client base consists of studios, film production houses and artists with macs. I own a few Android tablets myself, but my interest in them won't conjure audio support or a music application library. You can't be a snob when your hardware's your job.
Personally, I'm not buying the C.24 for other reasons. First, I like the action, scale and portability of less expensive keyboards. Second, the case doesn't fit the past two generations of iPads (which definitely eliminates the interest of the hipster user you mentioned).
If I were completely involved with Cubase or Reaper, I might consider buying a Surface Pro over an iPad -- that's the only real competition, but I'd still need practical field reports on latency. Music production is a special case.