To me this is one of the most annoying things manufacturers decide on when releasing their products – not including all the cables necessary to use the product!
Various USB printers have done this for quite a while, you have to buy the cable separately. Whilst it's sometimes understandable with cheap products, it's still slightly annoying that the product you buy isn't usable until you go and buy yet another cable. What I find really annoying is spending £300 on a console such as the PlayStation 3 and they're too cheap to include an HDMI cable. This is a console designed for high definition gaming, yet they don't even bother including a cable for it.
It feels like the modern equivalent of "batteries not included", certainly not something which should happen if you spend large amounts of money on a new device.