Sure this does not matter for a chip to be placed into a tablet or embeded into whatever device.
For Intel *need* a fix for any next server chip: Be it Xeon or Atom, it does not matter, as soon as workload is heavily multithreaded, there is a strong possibility for transactionnal memory to be a plus for performances. Not too long before it even becames mandatory.
Few end users have any idea what microcode is running on their processors from their various software vendors and therefore what their potential exposure is to processor chip bugs. I know from my personal experience that my Windows 7 laptop computer often locks up due to Carbonite back-up software "locking" files for backup even when the Carbonite software is "paused" because the backup operations are scheduled for hours that I am not using the computer personally. Sometimes the condition clears in 5 or 10 minutes; other times I must reboot the computer. Neither solution is convenient or acceptable.