That's binary. Assembly is using the CPU's, GPU's and DSP's machine code to directly control every little thing that is going on.  Assembly programming still takes place but usally only to help eleminate lag from user input etc. And this level of optimization can only be done with consoles without the reprecussions of seriously trimming away your potential user base. The upside to doing this is that you can drain every last drop of processing power you can. The down side is more lines of code since instead of using a language the encapsulates generic processes (The compiler and linker usually takes care of assembly), you are personally programming each and every step the program takes.

Wow, I'm excited for Renegades Kid's new game now!

now imagine what they could do on wii u lol

That's a bit more challenging; with higher end platforms comes more complexity, and manpower becomes a bottleneck.

Their statement wasn't that they couldn't make an engine for the 3DS, it was that Unreal Engine as it was architectured wasn't compatable with the 3DS. And there wasn't any demand from licenees or internal developers so that they had no reason to create a 3DS engine. 3DS is still a simple enough system that most developers can easily roll their own engine, there is really no market for engine licensing on  the system.

3D 240p looks way more better in image quality in everyway then 2D 4K HD, Literally.

So what are you talking about.