I just think given the prices being thrown around, and looking at the fact that, most people today think $600 is too much for a 27 inch 30inch monitor, I just can't see 4k becoming a standard in the next 2 years. Unless the prices drop really low. And again, most gamers are now opting out for higher refresh rate, over resolution. Seriously, I can't tell you how many people I know that will not buy an expensive monitor, unless it does 120hz. Doesn't matter how nice the picture quality is, or resolution. If it doesn't have the refresh rate for gaming, a lot of people won't touch them. And while I'm not the voice for the entire gaming community (I wouldn't be so bold) - my experience is that the general feeling among gamers, is that 120hz is a must for PC gaming (where graphics and performance is pushed beyond the console counterparts). I personally have not bought into this (I like the higher resolution over the response time) - but I can understand why this is a popular view. Why would you spend all that money on a nice GPU - that can push over 100 fps, and have a 60hz monitor?
So it all comes down to price, and refresh rate. I just don't see people opting out of 1080p for 4k right away. Then again, what do I know. Definitely not a business major. The fact that, all major companies/retailers sell the cheapest 2560x1440 27inch IPS for $700 - and yet, Korean models that are just as good (and even better, as they can go higher in refresh rate) - are much cheaper? So the hell I know.