Hi Spalding1968
The only reason musicians are not using VSTi extensively, is because apart from the Mediastation and Neko there is nothing that is fully integrated, and musicians don't or can't spare the time to set up the software to match their WS.
Times are now changing, and manufactures are responding to the demand, in that when you now buy most of the latest VSTi, there is a drop down menu that allows you to choose your WS or controller from the list, and the software is automatically set up for you. (The beginning of widespread integration)
With smaller and more powerful computers now available or in the pipeline, (A 64 bit OS is ideal) you will find Lionstracs and other manufactures will start building on the Mediastation/Neko principle to fulfil the demand of WS musicians. (Most of the features/ideas from the big boys are developed by smaller guys and adapted)
Times they are a changing.(This decade has been experimental with the hardware/software link, the next decade will see music playing/production go to levels hitherto unheard of so far)(Software allows flexibility and design beyond anything that can ever be achieved with just hardware alone)