Well I disagree there, I think the PS4 UI is perfectly serviceable and leagues ahead of the Xbone's. In my opinion the Xbone has the worst console UI of all time (well, since we've had consoles that have UI's, at least). It's terrible.
MS is iterating fast though, and we know that they have no problem completely re-designing their shit from the ground up. I have total faith that MS will fix the Xbone UI and sooner rather than later. Whereas with Sony I have absolutely zero faith, and I never will until they shift their software engineering manpower from Japan to Silicon Valley.
I love how the PS4 UI is minimalist and functional, but there are still many glaring issues that need to be addressed. Some of which are rather minor and shouldn't have taken this long to be fixed. Sony really needs to get their shit together here.