Switch are just refurbished unsold Nvidia shields in a new casing, confirmed.
But, seriously, all the games they've shown look exactly the same as the Wii U versions so I'm not surprised at all if this becomes true.
Nintendo stuck to GameCube level of graphics for the Wii and, in the same way, Nintendo will stick to Wii U graphics for switch.
The way Nintendo thinks, it's all about the gameplay and having Wii U graphics on a handheld it's amazing enough. Of course that's not what we want, we want ps4 graphics on a handheld (albeit downscaled to 720p) but that's asking too much from Nintendo.
They will sell the switch for super cheap so that it will be an impulse buy for many.