One point worth mentioning to those who haven't had a chance to work with touch is that with SONAR's knobs and faders, your finger does
not have to cover what you're moving. Once you touch a fader, you can slide your finger to the right or left, and still manipulate the control by dragging up and down. With knobs, you can slide your finger up or down, and manipulate the control by moving from side to side. This also works when touching several knobs or faders.
I agree that detailed work with touch is frustrating. Touch is great for turning things on and off, swiping, pinching, and scrolling; it's also good with faders and controls to a lesser extent, depending on the touch surface jitter. For detailed work, I still use a mouse and for speed, keyboard equivalents. However, learning how to use all three fluidly can definitely speed up workflow.