I personally don't believe that speakers need to come with speaker cable, since the type of cable you use is a very personal thing, and can depend on both your listening preference and your environment. However, with an all-in-one package like this, I can appreciate why Onkyo has felt the need to supply speaker cable, and the package as a whole benefits greatly from its inclusion.
Not only has Onkyo delivered speaker cable cut to lengths that should suit installation in a reasonably sized living room, it has also made it almost impossible to use the wrong cable length. Each channel on the rear of the amplifier is colour coded, as is each speaker, but the most impressive part is that each length of cable is also colour coded, making it virtually impossible to get things wrong. Of course if you're looking to run your rear speaker cable around the ceiling, or some kind of similarly unobtrusive route, the supplied cable may not reach, but if you've got carpet, you should be able to simply lift up an edge and lay the cables underneath.
Amazingly, considering the price, you also get a setup microphone in the box, once again ensuring that installation is as simple as possible. Once you've connected up all your speakers you simply place the mic in the sweet spot and run the auto setup. After test tones have been sent to all the speakers, the system will ask you to move the mic to the right of the room and then the left, running the test signals again in both cases. The result is that the end user doesn't need to worry about speaker distances and delay settings, everything will be configured automatically.
It's worth mentioning too, that the HTX.22HD is a very compact system, something that I hadn't realised when I first looked at pictures. The pictures are a little misleading, since I guessed at the size of the satellites from an assumption of the size of the subwoofer, but in reality the sub is quite small. In fact when stood next to the gargantuan sub from the Teufel Concept E400 set, the Onkyo looks positively tiny. The subwoofer actually measures 207 x 325 x 327mm (WxHxD), while the satellites (centre channel excepted) measure 101 x 175 x 111mm (WxHxD), making them pretty unobtrusive.