I have no idea who Soluto is and the notion that power users are the initial adopters of Windows 8 seems debatable to me.
Also, no one know what Microsoft's sales expectations of Windows 8 are. Were they expecting 30 million sales by now? 50, 20, 77, 88, 80, 300 million sales by now? We don't know so we can't really tell how far off they were. Until solid word says that Microsoft expected double digit sales in the millions compared to what has been reported, then and only then can we start to make the proper judgments about it, if the UI is the real turnoff, if people don't have 40 dollars and time to spare for Windows 8, if people don't know about Windows 8 (I've meet someone that actually believes Windows 8 only works with touchscreens), if their current PCs are running fine and don't really need the upgrade, if people don't have the want or the money to buy a new Windows 8 PC, and on.
It's a little too rash to decide the fate of Windows 8 this early.