The Intel Skylake microprocessor likely will not be available until mid-2015. But the Intel Broadwell Y Core M microprocessor that is supposed to be available in mass quantities by the beginning of 2015 seemingly will have very little speed improvement over the previous generation Haswell microprocessors, though it will allow for super thin devices due to how energy efficient they are (thus eliminating the need for an internal fan) and be able to drive a retina screen at the same time. If Apple manufactures a MacBook Air Retina with the Broadwell Y Core M microprocessor, it may not be much of a technological advancement other than in slimness and the addition of the retina screen. But if Apple waits to manufacture a MacBook Retina with the next generation Skylake microprocessor, there will arguably be speed enhancements to go along with a super thin profile and retina screen. Is this why the MacBook Air Retina has been delayed? To a layman it sounds as if Apple ought to wait another half-a-year for the Intel Skylake microprocessor for this new device rather than succumb to using the Intel Broadwell Y Core M microprocessor. And I say this as someone who needs and is ready to purchase a MacBook Air Retina now.