It's just that I think it seems to be a pity to have the tablet in a stand, connected with a cable to the stereo. Instead you could have it in your lap, and use it as a very advanced remote or to read a book...
For me, the whole idea with a tablet is that it is possible to carry it with me and use it anywhere, without any cables. If I was going to use cables I might as well use my ordinary computer instead.
I control my Squeezeboxes for music, I stream video to it, I pipe sound out from it using bluetooth, I check IP-cameras of my back yard and garden on it, I control a torrent daemon to add toorrents. I remote control my main computer. All wireless, from anywhere in my house.
Oh... And I also read books on it.