thanks folks for pointing out that there are already fanless win8 systems out there, so this is not at all the stupid idea some might say it is.
whether a fanless system is "too slow" also remains a consumer decision. i personally would give it a shot if it approached the thinness and weight of the non-Pro Surface.
my prediction is that msft will deprecate (i.e., support but not release a new version of) the Surface 2 and RT in general. the Surface Mini will run "real" win81 just like the Lenovo Thinkpad Tablet 2, and the SP3 will be a fanless machine with the current non-Pro Surface form factor. at least i hope so.
and all those who wants laptops can buy laptops.
Surface MINI will be an RT Machine, rumored to be running on Qualcomm's Snapdragon 80x SoC. Despite what many people are wanting, Windows on ARM isn't going anywhere in fact the eventual merged Phone/RT OS will be the foundation for x86 ATOM Tablets as well (Desktop free).