It's pretty much guaranteed the apps won't be behind a paywall next gen on either system. This + indie apps + multitasking + cable integration and it's a wash. Xbox One wins the multimedia war handily.
Also, I don't think the rest of your little list overcomes even a 50$ price difference, let alone a 100$ difference. People are price-oriented, like it or not.
I mean, multitasking? Doesn't the PS4 also switch apps on the fly just as easily? Or do you mean the nifty snap feature?
And indie apps? You really think the mainstream "TV watching" consumer will care? Last I heard nobody even gave a fuck about the W8 app store on PC's.
Time will tell, I guess. But I don't think any of these "features" will hold as much sway as a 100$ bill.