No - he sold stock because he perceived that MSFT, in trying to catch the cool and sexy tablet PC market (which has been Apple's turf) has created software that will be a disaster for it's core user group - business users in the laptop/desktop market. This will be worse than the Vista disaster, because I understand there are special hardware requirements for desktops to run Windows 8. If the O/S is not appealing to desktop users, they will delay purchasing new computers equipped for and pre-loaded with Windows 8, and some manufacturers are going to have very bad years. Not to mention MSFT. The iPad kids are true believers - they view MSFT much as we view Obama. A new O/S is not going to get them to dump Apple. So MSFT is alienating it's base while gaining an insignificant market share in the tablet market.
“This will be worse than the Vista disaster, because I understand there are special hardware requirements for desktops to run Windows 8.”
This could be the time when desktop Linux finally gets a shot at some exposure. If corporate users can’t run Windows 8 on their current hardware — but CAN run Linux — that may convince many companies to switch.
One of the big things keeping Linux off the home desktop has been the lack of games. Valve just announced its intention to release a Steam client for Linux and started a Valve Linux blog: http://blogs.valvesoftware.com/linux/
Other game makers will now have to do the same in order to compete.