I'd think Microsoft has a tight relationship with Intel, a fact even mentioned during the Surface Pro 3 announcement. Therefore, the Broadwell chip with equivalent power as the current i5/i7 will come at a much later time which caused Microsoft to move forward with the release using current chips. I'll bet the first Broadwell processor devises will just improve on the atom processor but not reach the same speeds as current Haswell processors. If this turns out to be true the first Broadwell processor would be a better fit for the Surface 2 update and not the pro line. Ya I buy into the Surface RT thing because its not going anywhere other than merging with Windows Phone. There is a need for a striped down operating system. Someday that might not be true.
After much thought and research I ordered the Surface Pro 3. Anyway, most processor for tablet improvements are just step increases such as maybe a couple hours of battery life or graphics.
A better question might be should one wait to upgrade to a Broadwell devise or wait for the next best Haswell with the better speed memory which is also coming to Broadwell later.
Intel Devil's Canyon, Pentium Anniversary and DDR4 Haswell
Before anyone posts there are always better things coming and therefore one would be waiting forever, it seems appropriate to review the next best tech to see if it meets your needs because existing tech does not. If Surface three gets what you need done in terms of power then order it. The larger screen was significantly different than Surface pro 2 and if you need that than order Surface Pro 3. The same could be said if you needed a better keyboard pad or kickstand or whatever.
Eventually the Surface Pro design would have evolved into what it is intended to be. Surface Pro 3 might be there. If so, we will be able to do what we do with desktops and laptops which is to not upgrade until our existing machine dies or the battery shows sign of wear which is maybe every four years. If you loose $300 to $400 each year by selling off the existing Surface for the new model, waiting four years to upgrade is about the same cost. Not to add confusion to the decision process, but selling your existing Surface off and buying the new is monetarily about the same as waiting for the next best thing. Therefore resale value of the Surface pro becomes as valuable as the new processor. Apple has the resale value, for now, which made it good for folks moving through iPad 1 to 4.
My personal strategy regarding Surface was to sell off the old and preorder the new. This may change with Surface Pro 3 because it appears to be so damn good for meeting my needs which again was the Surface with a larger screen. Sold my laptop off and use the desktop at home very little. So, diverted expense of upgrading desktop into a better tablet/laptop combo.
