I thought with thunderbolts u-buet chaining we could have 10(?) devices from the one port?
Of course, that's not saying that the Mac mini video has the grunt to run more then 2 displays, but just a comment regarding the selling speal about thunderbolt.
10 devices but only 2 of them can be displays.
(Actually I think it's only 6 device, apple spec sheet)
The 2 limit is a limitation of OSX. intel hd 4000 can support up to 3 displays and this seems to be the case in Windows/bootcamp.