The following information comes from Teut Weidemann, one of the first German professional game developers. He worked at Rainbow Arts, Microsoft USA, cdv Software Entertainment, Ubisoft and more. It does not seem that Mr. Weidemann is working on the Switch himself, but he is in contact with devs that have dev kits.
Switch screen is a touchscreen that supports up to 10 points of interaction
current dev kits are running on older hardware specs
Switch may be based on the new Tegra X2, which is quite a jump from the X
I took source from Neogaf.