This 32GB module would probably fit a PCB for a socket we've never even heard of, custom kind of thing. We probably wouldnt be able to access that for several years, as Intel have several lineups in the works that they want to sell to the general public, many of which are still on the drawing board and would need time to perfect.
Consumer sales are always several years behind the development process. Ivy bridge is the new processor but it was on the drawing board and in small batch testing 5 years before the public had access to it.
DDR 4 will very likely be just as expensive as DDR3 was while DDR2 was still the most common ram on the market, though there is the factor that the advances in the manufacturing process have helped reduce production costs. Regardless, DDR4 wont be cheap when it's initially released as it costs money to convert to new production processes. They charge more because they want the return from reseach and development costs within the first 2 years of release. After they get their money back they tend to drop the price a product and its related production costs become more common.
I would foresee 16GB modules being released with DDR4, but 32GB modules released with DDR5, much in the way 1GB modules were released with SDRAM, 2GB modules with DDR and so on. Here we are with DDR3 and 8GB modules.
The same thing happened with the initial release of flash drives. A 4 gig stick cost more than $50 AUD on release. Now you can get 16GB for $8.
Die shrink is highly important to allow more tech in a smaller space and expensive to implement as both module makers and the motherboard manufacterers have to roll to new production processes and industry standards. WE get to pay out the ying-yang to have the latest and greatest
Operating systems that could take advantage of one or more 32GB modules still have to be written. This is what we technophiles love about PC's - the whole development process and the fun we get to have gaming with uber new gizmos.
