Maturity is the big thing I think a lot of us are waiting on:
30Hz is simply unacceptable on a computer, so we need to see 60Hz panels like this across the board.
Scaling is another issue. Either we need better scaling technologies built into all OSs or we need to see some larger 36-42" monitors coming out that can take full advantage of the resolution without the need of more than a 125% scaling. Newer programs will be built to scale better, but there are a lot of older programs and websites that simply will not be replaced or redesigned over the next 10+ years.
Then there is the GPU issue. Sure, 1080p on a 32" 4K display looks OK... but you can do that equally as easy on a small TV or large 1440p display without nearly as many odd issues. GPUs need to start supporting HDMI2, and they need to get fast enough to deliver a solid and consistent 30-60fps at 4K. And the GPUs themselves will need to hit that sub $500 mark while delivering that kind of performance.
Last but not least is price. $1750 is really not that bad of a price for what it is, but that is not the full price. You will need another $1-2000 in GPU hardware to push the display bringing the cost closer to $4000 when it come to being particularly useful. Fast forward a year from now and we will have a new generation of GPUs which will be much more capable at driving 4K displays at lower price points, or with a single card setup. Plus the display tech itself is going to drop in price dramatically for the next few years. I would expect the total cost to drop almost 50% over this next year before prices start to stabilize at all. Even if I had the money I would not particularly want to see that kind of depreciation, especially as the display tech continues to mature with better inputs, better displays, and better controllers being implemented.
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