Upload & Sell: Off
A studio light should be LESS than a speedlight! The only downside I see to speedlights is limited power, but with digital camera's that's not much of an issue anymore. Hi-speed sync, iTTL, transportability, these all make the small flash much more appealing to me. And now that they won't shut down in the heat of a session...well I'm in.
If what matters to you is transportability, then a Yugo should be worth a lot more than a Bentley, too.
Nikon's little plastic speedlites are getting into the lower part of my Bowens' price realm, but without the power, or the build quality, or the cooling fan, or the modelling light (proportional, of course). Of course (as you point out) the little plastic hot-shoe flashes are highly transportable, battery powered, and offer rear curtain sync. I own and use both, but the profit margin on the little speedlites has to be astronomical...the components are cheap (SMT) and the assembly process is easily automated.
FWIW, the example in my original post wasn't about build quality (I've never seen or used any Paul Buff products), but about the TYPE of flash...a studio ringlight, the most expensive to build because of the specialty, curved Xenon tubes...and, yet, the 910 costs MORE than that. Yikes!
As long as Nikon has willing customers to buy products at whatever price they demand, prices will go up (even though it is an electronic product and throughout history ALL electronic products have come DOWN in price over time).