Try 32-64, and the processor itself is similar to a supercomputer, but it will not be one. the idea of putting many cores on a single chip is not new, it started with the dual core Power 4 chip, and is just an extension of massively parallel computing. (By the way, there will be a supercomputer version of the cell design, produced by IBM, it is code named Blue Gene. It is expected to reach bout 384 Teraflops.)
As for sony's marketing of it, who gives a damn where they put it in? Did you know that intel has been showing off high quality HDTVs? Did you know that IBM still makes clocks? Did you know that 3M owns a mine? Either way, who cares, sony will never be able to make cell in a toaster, this isn't a bluetooth alternative, this is just a way to show what sony wants to happen, not what they expect to happen.