Probably marginally so. I wouldn't expect a monster upgrade though. 

If true, then pretty much this. It'll probably obtain a different type of third party support, but not the one anyone in the console medium cares about.

I say better AMD or ARM cpu (much more user friendly than PPC), around 4GB of Ram and slightly bitter and modern GPU, that would make big difference vs Wii U hardware and enough power for 1080p Nintendo games (Nintendo already on Wii U have Zelda WW HD and Smash Bros. in 1080p) and at least 720p for third party games.

People bring this up but never really go in detail.  Its never really mentioned, but what if Nintendo does an inverse of the Wii U gamepad, the main tech would obviously be in the NX hh, and the wireless streaming tech would be on an HDMI dongle.  (Now instead of the gamepad having faster input lag than TV, the main screen would be faster).  

This would also open up a bigger budget for the home console's gimmick.  If the HH is powerful (enough) I see this as a  possibility.

Considering that the Wii U's CPU is a tricore 750cxe (G3 for mac users), and the GPU is equivalent to a Radeon HD4870, it's definitely possible. I was just looking at the specs of the Cortex A72, http://www.vrworld.com/2015/04/27/arms-cortex-a72-to-rival-intel-core-m-cpu/. The Core M based Macbook has benchmarked about the same as a 2011 Macbook Air meaning that the processor is probably within the range of a 2010/2011 Core 2 Duo. The A72 is slightly weaker, in regards to total performance, but that places it around a 2008/2009 Core 2 Duo. However, it's worth noting that the comparison is core vs core, and ARM has no problem stacking 8 or more cores on a single chip.

With that said, if Nintendo were to use two, octa-core Coretx A72s in their next handheld, with at least 2GB of DDR4L ram, and a GPU equivalent to the Radeon r7 250, which isn't all that much weaker than what's in the PS4 and Xbox One, with 1 to 2 GB of GDDR5. This, paired with a 720p, 5" ips display would easily create a handheld comparable to the current consoles. The power draw would be fairly minimal, resulting in a battery life of around 4 to 5 hours, and it'd be able to easily 'match' the NX console version. 

Just put good software on it, horsepower should be irrelevant.

I'm pretty sure this was brought up before, but I'll still wait for the actual reveal of what the NX is..

Do I need to remind you that the same sources that talked about Nintendo using Sharp's free form displays also said that they would be donut shaped? Now, do you really think Nintendo would use that shape on a handheld or hybrid gaming device?

OT. The decision to purchase or not a console should be based on its price and games. And sure, if this rumor is true then it will have next to no support from the big publishers (nothing new for a Nintendo console), but it will have Nintendo in full force and the indie scene that so far seem to like how Nintendo works with them.

Didn't Iwata recently say something about then not wanting to repeat past console mistakes that they have made with the NX? If so, then this would be a major past console mistake.

Maybe its aiming higher (I really pray for that)?