I think it'll be stronger than Wii U and not have the Gamepad with it. What's that mean? I have no idea. Maybe there'll be a Handheld and a Console and they'll both be the same price but the Console will have higher specs to accommodate for the lack of a screen? That'd be kinda rad. I don't think it's possible, though.
I feel like people will find a reason to bitch about NX regardless of what it is or what it does. If it's as powerful as PS4, people will complain it's not more powerful and lacks the games of it and Xbox One. If it's more powerful, people will say Nintendo is wasting their resources because no external developer would use that extra power effectively because there'd be no reason to do so on a system with little to no install base. If it's weaker, people will complain that Nintendo simply isn't trying.
I personally want a better system in general. The thing can't be slow as shit. Taking 20+ seconds to go into system settings then another minute into Data Management is terrible (Data Management in general is a mess as well). 2-4 hour Day One updates should not happen. I want effort. I want to look at NX and say 'okay, Nintendo believes in this thing' because if you look at Wii U, they sure as shit did not. Confusing messaging, branding, you didn't if games were coming to it or not at launch. Time and again, Wii U was a question mark because they probably didn't even know what it was. How they could apply their weakest first party output (The DS) to the Console space and think they could be successful with it is beyond me.
Nothing on Wii U makes you go 'oh man, that Gamepad really made the game better' where with Wii, there are tons of instances where you can say the IR pointer or the Waggle made the game at least a little bit more fun than it would've been with a standard Controller (Twilight Princess' IR aiming, Galaxy's Spin Attack). Sure, there are other examples that are bad but at least it gave you something. What does the Gamepad have? A hardware feature. Not really much else.
And don't even get me started on TVii. It never had what I wanted to watch on it. If you want an example of why Wii U failed, look no further than how incomplete that thing is.