One thing that may push Mini upgrades: The AMD 780G. It appears to be a superb integrated graphics solution, much superior in performance and features than the Intel X3100/X3500. I'm sure a mobile version will follow soon. In response Intel might push its customers to upgrade as quickly as possible to the X4500, which would be a good move for Mini fans.
That is correct! I would even love to see them using the 780G with GPU and CPU from AMD. Energy efficient and HD 1080p decoding support built in as well as PCIE2.0 (http://www.techwarelabs.com/reviews/processors/780g-and-4850e/). Intels IGP so far are widely used but lack real performance. I hope we will se an update soon!