How do people assume they know what the NX will be?

If anything, Nintendo has shown that they are more of the unknown. There have been times that they have been the top, or near the top for power. They have lead the way with innovations for gaming and controllers and the way games are played. The motion control came out of nowhere. The analogue stick came out of nowhere, the L and R buttons came out of nowhere. What's next? Nothing? Something? Will minds be blown? Will people be disappointed? Perhaps all the above?

It's all speculations. I don't know anyone who rightfully claims to know what NX in it's final form will be.

Nintendo has provided a number of clues about their future direction. If you connect the dots, you can sort of predict the consoles nature

For me it's certain that NX will be much more commercially successful product than Wii U.

I know about as much about the NX as I do Cecil the lion. So I'll go with that one.

NX is secretly a Wii covered in chocolate.

NX is basically a guessing game at this point. While I might have an idea of what it could possibly be (given what I've seen in forums and from Nintendo themselves) nothing is truly set in stone just yet.

Most of the time people assume its a home console to fit their agenda. Its the ones that are so certain its not a handheld.

It ends up merging Sony and Microsoft consoles into one big happy family.

If only.

Mind will be blown, that much is clear. Whether or not in a positive way is still uncertain however.