Samsung proposed a new MMC specification including faster than 100MB/s speed. So far, the fastest flash speed is just a little over 50MB/s. 200x flash is still just about 30MB/s which is faster than 16x DVD but still much slower than most DRAM chips.
Source: Electronic Times news of South Korea (In Korean), http://bbs.danawa.com/view.php?nSeq=33700&nSiteC=1&nGroup=7&nBlogCateSeq1=404&nPage=1
USB 2.0 must be replaced with something at least as fast as SATA II by then. It’s too slow to be used with HDD, DVD, HD DVD, flash, etc.