It's not so much the sum as it is the value.
For 16 bucks it was sure a legit OS for 16 bucks? Hard to pass up.
200 bucks is just 200 bucks when it comes to 200 bucks.
I just dropped 300 bucks on a Nexus 7. Sure I might have gone and suffered another 200 and bought a Windows 8 using tablet. But I can't see any value in a 500 dollar purchase of what I already have in my 10 inch Android using tablet. I'd like to be able to play some Windows games on a tablet yes, but I don't have 500 bucks worth of interest yet
The Nexus 7 was about getting something purse sized really. I don't really like some aspects of Android, but again, it's like Windows 8, I don't hate it, but I need to need it bad enough too.
I'd have loved to get a Windows 8 using item in 7 inch range for 300 bucks. But until MS realizes the market for pretend Apple products is already fairly crowded, and there is only so many people that will be paying 600 bucks for a Johnny come lately product that isn't really great enough to merit that much interest eh.
Some things are just only worth so much. I'd rather have root canal than pay 200 bucks for Windows.