@waltc -- If you've got a 27" (or bigger) monitor I'd imagine that you'd be sitting FAR ENOUGH away from it (at least arms length away ) that even if you wanted to use Touch it wouldn't be feasible. Imagine with 50 inch or even bigger monitors -- most large screen TV's sold these days can operate quite decently as a Computer monitor too and often are used for that purpose.
However using Multi-monitors becomes slightly different - if so you are using a pen type device on a tablet like screen then using touch on one screen to project the image on to a larger screen becomes much more practicable. Photoshop for example -- but using Touch doesn't mean that you have to use horizontally scrolling tiles. Touch can be used IN CONJUNCTION with a mouse -- unfortunately the arguments proposed usually assume ONE OR THE OTHER. The most useable system actually allows both to be used concurrently -- filling in areas in Photoshop is much easier with a pen like touch device while manipulating large blocks of text for example is best done with a keyboard and mouse. No touch device even comes close for that purpose.
Note though provided you as a user can find a decent method of launching your applications the whole start menu debate is a bit silly now --if you want one there's applications around, if you don't want one don't use one. I can't understand the whole hostility to using 3rd party apps --- people use Browsers, Back up programs and loads of others without even the tiniest squeal -- why not a start menu if they want one.
My complaint is that an endless horizontal scrolling system is ridiculous when you have a lot of complicated large applications - it's ok for a FEW simple apps and that's more appropriate to a small Mobile phone screen - not an office Computer and certainly NOT a server.