That makes no sense. How does buying an $89K car instead of a $25K hybrid save you money? These incentives better be of $64K in value, otherwise there is no monetary argument to be made here.
Don't get me wrong, I like the Model S, I think it is a wonderful car with tons of innovative technology inside (and, no, I am not just talking about the battery power). But there is no financial argument you could make that would justify buying one over a Prius or Ford Fusion.
The only reason the Model S appears to have such a good resale value is that there was a huge backlog for a while, and people were paying OVER retail price just to get ahold of one. Kind of like the Nintendo Wii the first christmas it came out, doesn't mean a Wii maintained that value over the medium to longer term.