Has a concept..., or major software release ever generated the same buzz?
yes - think back a decade to the irresistable prospect of being able to virtualise ALL your production servers, reduce power and hosting footprints, maximise use of server resources, provision servers in minutes and deliver resilience beyond imagining. Then, the counter arguments were customers were putting all their eggs in one basket, that they needed phenomenal amounts of hardware to deliver performance+resilience which in many cases wiped out the advantages of virtualisation. At the time I counselled using virtual hosts for develpment environments where performance and resilience weren't so key. This time I say the same thing. Use it for development servers first and when you've uncovered all the gotchas, move your prod environments on there. But will they listen? Will they heck!