Actually, the display can be "fixed" to some extent by disabling some of the power saving feature and doing a calibration. I actually just looked at mine again and I don't really notice it. I think a lot of people are over-reacting online and/or there was a bad batch of displays. Either way, you can't really do proper color work unless you are in a controlled environment with a calibrated screen so I don't agree with you that this makes the device "unusable"
The problem can be mitigated, but the panel still cannot display a true yellow; it remains a mustard-brown color. This is due to the technology behind the panel, not a flaw in manufacturing. Other laptops that use this panel have the same difficulty. Color accuracy is important for me even if I'm just viewing photos or videos, or even playing games. This may not be important to everyone, but there was a pretty significant outcry when the Yoga 2 was released and the panel's limitations were noticed. Having yellow that's a bit off (as per most non-calibrated panels) is one thing, but having a panel that is incapable of producing anything close to yellow is unacceptable, especially in a device in this price range.
Never mind that the fix decreases the Yoga 2's battery life, which sucks considering that its battery life wasn't as high as other laptops to being with.
Windows 8.1 (which it came with preinstalled) has actually resolved most of my complaints about Windows 8. There is still the issue of MS moving stuff around and not "polishing" the new "homes" for things but most of my immediate frustrations have been addressed (I haven't even installed a Start Button replacement this time around).
It makes the OS more usable for people used to the traditional Windows interface, but there's still a big separation between the tablet end and the desktop end, and it's not easy, or at best automatic, to appropriately switch between desktop and tablet mode. Windows 8 (in all forms) also has horrible scaling issues, which becomes an even bigger deal with high PPI displays like the one on the Yoga 2. While these issues don't render the OS unusable, Windows 8.1 is still a far cry from what Microsoft should have produced in a convergence OS.
I'm not knocking on your personal preferences or opinion... but I am saying this device is ALMOST that convergence and I think it is the right form factor/compromise. Add a docking station so it is easier to connect to desktop stuff and it is the "perfect" solution.
The Yoga 2 almost sold me, but I couldn't bear spending that much money on a unit and have a screen that couldn't display yellow. I spent about an hour in Best Buy playing with the thing and couldn't get pictures to look right without proper yellow (even with the fix). That, the scaling issues, and the antiquated wireless device made me put off the purchase. Shame, because the Yoga 2 strikes a chord in so many ways that other devices don't.