This is all a semantics game. Personally, when I think "off grid" I'm thinking "grid-tied, but I generate as much juice as I can through solar cells". Excess gets sold to "the collective" and on rainy days I pull from the battery that is the grid. Unless you live in a Seattle-esque climate, that is an achievable goal for most single family homes for not a whole lot of money. It takes pressure off the central grid and through tax incentives isn't even much of a financial hardship to implement.
Being entirely grid free is a much more expensive proposition since you need a fairly expensive bank of batteries to store energy and perhaps a generator (pick a fuel) to CYA when the weather isn't cooperative.
I've voted with my pocketbook and am going the grid-tied route. For about US$15k I will have a system that can power my home on sunny days and will likely pay for itself in 5-7ish years.