So what am I missing…what does Windows 7 offer the happy Vista user
Primarily, significantly faster computing!
I know it is supposed to be less resource hungry…but then that's not causing me a problem
Vista is FULL to brimming of crap you don't need, slowing it down massively. Vista minimum requirements are a joke, and even then, if you have a machine that just about meets these, it will be VERY slow. My work 2Ghz Core2Duo laptop with 4GB of RAM is hopelessly slow with Vista, and it's only a 6 month old machine, and not a bad spec one at that!
Basically, Microsoft made a mistake in expecting the pace of progression of computer hardware to carry on at an alarming rate, hence they thought they could really go to town when creating Vista, and not worry about it needing much higher spec machinery to run than XP. The pace of progress of computer hardware has slowed quite a bit though in relative terms. Even now many new machines aren't up to much cop running Vista!
Almost all the important stuff in Windows 7 is hidden. So for your average Vista user, that doesn't regularly explore the limits of their computing power, but does notice the superficial things, they will be completely underwhelmed. For the power user, who cares little for fripperies that mean sod all, but care a lot about the efficiency of their OS and the ability it affords them to run very resource hungry applications to a higher capacity, it will mean a hell of a lot!