They aren't saying that at all. The new MacBook Pro is likely to come with a Retina Display, a quad-core processor, a discrete GPU (in some configurations) and larger storage capacities (by virtue of continued use of hard drives, perhaps with a small SSD for faster booting). The Air comes with none of these features.
What Apple appears to be saying is that they think the time has come when it is no longer necessary to include optical drives or Ethernet ports built in, even on a "pro" notebook.
They're simply observing the rise of wireless and the trends in recent years of acquiring software via the internet. Other than some dreadful software I've had to install from DVD recently, I can't remember the last time I used the DVD drive in my laptop (and I work in the industry)... nor can I remember the last time I plugged an ethernet cable into it. So with that said, I very much agree with you.