Also, isn't the phrase "What you don't know, and no one will tell you" oxymoronic? I suppose "what you don't know, and only I will tell you" doesn't have the same ring to it.
Seriously though, this is pretty cool... I am fairly surprised that there hasn't been a DC standard for lighting fixtures come into play yet... Which could be much more effective in terms of cost over time, and temperature control. Given the shear number of wall warts, and other fixtures common in the home, it would make sense for a more common interface for DC (especially low watt)... USB seems to be becoming that standard, but for lighting, and safety for internal wiring a new standard is probably needed (or an old one revisited).
AC is nice because it's easy to convert to other voltages. With DC you'd need either the exact voltage - or a converter, and if you have a converter you might as well just go directly from AC.
Added bonus you get ethernet too so any devices like LED lights, cameras, etc can be programmable without wifi/zigbee/etc.
You would still need a DC/DC converter, and if you do that you might as well just go from AC.
PoE is helpful certainly, but not as a way of having universal DC in the house.
You are thinking wall-wart type applications. I'm more along the lines of infrastructure, lights and other permanently installed devices that can be designed from the ground-up to operate at 44v.
Why? What's the benefit over 110v?
edit: Here it is: http://www.youtube.com/watch?v=m5rM7QDi_5E&t=11m39s
It's a cheap trick of appearing honest by using impossible hyperbole. The meaning of the statement is so obviously not equal to its literal meaning that if the writer is challenged over the honesty of it he could plausibly defend it by saying, "It feels like this fact is not being communicated sufficiently to consumers who are not familiar with LED lighting." In other words, it's a way to manufacture compelling copy without needing any facts to back it up.
"And no one will tell you" also seals it for the future.