A made to order 65" would make no sense at all. It's either a mistake, or they changed their minds about releasing the R series but are doing this just to save face. Generating this much hype about the R series then canning it completely would backfire pretty hard. But even so, a non mass produced 65" would be priced so out of line with the other competing sets that there would be virtually zero sales. Probably less than for the 120".
And even though they haven't announced a P series, that would make no sense not to have one. They are in a business venture with VUDU for the HDR capabilities. There is no way VUDU would accept that partnership with Vizio if the only sets they had to showcase the new tech was through two obscenely priced made to order TV's.