That sounds really anemic for 2016. The Shield 2 is coming in 2014 with over twice the GPU processing power, probably with a 1080p screen too.
Those specs are the technical equivalent of Nintendo launching a handheld right now that managed to be a lot weaker than the Vita.
Oh wait, this is Nintendo. Move along.
While that does sound like a great concept, not everything is perfectly scalable as long as you're using the same architecture/instructions.
For example, A.I. complexity, number of NPCs and number of players in MP mode can't be easily scaled up and down if you have a system that is much weaker than the other in processing capabilities and memory amount. Developers would have to scale some settings back in order to comply with the weaker console and that would mean hell in the inevitable comparisons with the other consoles.
The nice thing about this sort of architecture is that the design is modular, 4CUs sound great but considering Nintendo's actual goals and audience (the masses) 2cus would do fine and offer more battery life.