The whole navigation system needs a bit of tuning to function properly with a touch screen.
Yes - the rollers (aka menu system) are not really touch-friendly in the sense of working how you'd expect them to work on a touch device. But first things first! This is an "easy" request thread I think, and Theater View is ostensibly a remote-control and keyboard interface, how much it changes or can change or is reasonable to change to become a Windows mobile remote app remains to be seen (as syndromeofadown suggested above - a new applicaiton for touch mode). But in the first instance some basic usability on a tablet would be extremely welcome, for example the playback controls, zone changing and playlist manipulation, which are pretty fundamental and essential and you just can't use it without.
I have to say I was quite pleased with how well it's working now on a tablet actually, having come to play with it recently in response to this thread. I last had a go a long time ago using an antiquated 12" acoustic wave touchscreen monitor, originally a PoS device I think, that I bought second-hand. It wasn't the best of experiences at all, although I don't know how much of that was due to the non-capacitive screen of the monitor. But I found Theater view practically impossible to use.
In the last week or so I've now used an iPad and Splashtop remote control to test it out and even with the lag due to the network streaming of the desktop, it works very well in areas that I found diffricult before, i.e. scrolling of the screen, and access to the items off the right hand of the rollers. In fact, I would go so far as to say that it is much, much easier to use than with a remote control or keyboard now! just with the caveat of the things I've pointed out. As long as the improvements continue I'm now seriously considering a Windows tablet (Linx 10.1", Asus 10.1" Transformer Book, or 10.8" Surface 3). If I had a room big enough, I'd go for a coffee table 19" all-in-one PC!