OK, I've done some further research and came across an Intel video survey presentation for IT Managers by some guy named Garcia regarding the importance of VT-d as a Desktop Tool for personnel who want to have dedicated memory via their Desktop for their Smart Phones so they can slip in & out without interupting the normal tasks of the Destop while they're roaming for meetings. lunch, or after work, and,or, for their supervisors who want to check on a few things, without the hassle of obtaining the attention & cooperation of the Host OS. In other words, the peripheral device in question in regards to VT-d is a Smart Phone, Laptop, or the Boss, not a printer or coffee maker as I suggested earlier(...why would they need dedicated memory in the Desktop?). I'm guessing VT-c is an additional feature for VT-d to enhance remote connectivity (or also for VT-x to enable an internal Guest OS to call out? which is what I desribed earlier too). If VT-d,c have nothing to do with internally installed Guest-OS then I have nothing to worry about when I do a work up on Windows 8 or Macintosh or Linux via Virtual Box etc.on my Win7 Machine. There may still be some unanswered questions though for those who are considering a complex array of virtual servers, but this answer may help demystify the main confusion most including myself seem to have with this issue.
I hope someone with expertise in VT-x,d,c will help confirm or deny what I've suggested so far in the preceding two posts, as well as provide whatever additional information so we consumers have some idea what it is we're getting ourselves & our $$ into. Having to talk to myself in a public forum for a lack of feedback can be rather unproductive if not also wierd. HELLO ANYBODY THERE???