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.
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.