This one is a real no-brainer. Solid-state makes too much sense to not use it in tablet form factors. The real question is whether they will take the opportunity to redefine the file systems to take better advantage of it instead of pretending that it is actually spinning media. It wouldn't surprise me if that is one of the things that Google is baking into their "real" tablet OS (as opposed to Android).
The average density numbers here are the really interesting ones. It is not surprising that the use of NAND flash is expected to increase since the number of tablets are expected to increase dramatically from several suppliers. But when that is combined with the expected rapid increase in the amount of NAND flash to be used in each tablet it leads to a projected very rapid increase overall indeed. It will be interesting to see if the projections are overly conservative or are too ambitious.