Me personally, I think Velvia/Provia are popular enough that chemistry and processing will continue to be made for E-6/CR-56 for some time - hopefully longer than 18 months!! After all, Fuji didn't reintroduce Velvia 50 for no reason - there's a market there for it so they reformulated it when one or more of the old raw materials used to make the original 50 ISO Velvia were no longer available.
Hang on, if it can make economic sense for someone to produce Precisa again, how does making Ektachrome not make sense, I bed Ektrachrome sells much more than Pricisa.
I shoot slides in part because I can project the images at a higher quality with a slide projector than I can with a digital projector (not to mention the difference in price between the two!) Having said that, the iPad and its ilk could finish slide film off. The new iPad announced today has a 2048x1536 pixel display, which is higher than that of an HDTV at slightly more than 3 MP. Get it up to 6 or 8 MP and I might bite for the right price. 'Til then, slides are the way to go for me.
The Slide Curmudgeon, aka ME Super
Projecting a set of slides you just got back from the lab is so much fun.......nothing can beat it. You have no idea what you have and then to see the photo for the first time 4-5 feet wide on a big screen in the dark! I can't understand how anyone could NOT get a huge kick out of that.