I've never heard about this rumour of 120fps and 4k. I don't think it's true because that would be very expensive right? though it would be awesome!
I still believe NX will be released next year, probably NX hanheld first, august 2016 and then home console in november 2016. They should think about the company, and the market as well, and how bad they have been selling for three years.
They shouldn't think about the few people that claims they won't be buying anything Nintendo related if they release the nx so soon.
I'm sorry but I don't understand this feeling, how can you get mad at a company trying to not loose any more money? They have supported the wii u for three years now and I think they should have sent it to die earlier, but they have invested in something they knew it wouldn't be profitable, just for their public and to make you enjoy the console. At least we have:
-Mario kart 8
-Super smash bros
-3d world
-Yoshi's wooly world
-Dkc tropical freeze
-Zelda WW hd
-Captain toad
-Super mario maker
-Bayonetta 1&2
-Splatoon
-Xenoblade chronicles X and many more.
Really, I don't get why people is sometimes so harsh with Nintendo, can't you see they failed big this time with the wii u? Enjoy the games you bought and be happy that we will have a more powerful console next year, which luckily will have more third party games, so it's a win-win situation for everyone.