In my opinion, it's a huge difference, they will probably release 32' monitors too, as they did with tv's. I'm even looking forward to see them.
I REALLY love the second monitor. It's on my list, my second monitor is starting to die anyways so I might as well.
Actually I have exchanged it for an Olympus OM-D E-M5 with & 4 different lenses, but it was deal of my life... I will probably buy the same monitor in 3 or 4 months, when I'll be back in Poland. P.S You wont regret it, trust me