http://www.gartner.com/DisplayDocument?id=971119

A classic example of this is the shift from SBC to VDI. Large organisations have been doing this for some time but only recently have mid size really started to take this seriously. They know they need it, they know it makes perfect sense but they have been holding off due to the added network requirements and costs needed to make it work correctly, and have been waiting for the Big Brothers to find the “Best Fit” solution and the “Solution Stack” that works.

But it seems they are almost “Changing tactics”. Because they know the core infrastructure is going to be virtualized VERY soon, they see now is the time for moving forward with this, and are looking to implement virtual as opposed to physical network offerings, like accelerators, to reduce network costs so that they can preserve more money now and not have to play catch up 2 years down the line. This also has the double advantage of creating a good reason and extra cash to help fund the core server infrastructure.

I agree the time for the big bang is soon, but I reckon there have been a lot of lessons learned over the last few years and if they do the research and are careful to not run before they can walk the whole shift does have a chance of happening smoothly.