I have a Surface Pro and while it's nice it's still clunky as hell, Windows 10 will not fix this because honestly Windows is 100% crap for a touch interface. The software and OS are not designed for touch and therefore will be clunky.
Windows 10 for laptops.
Windows Touch for touch devices.
Stop trying to unify the two because IT WILL NOT WORK. windows 8 sucks horribly on a laptop but works nice on a tablet. windows 10 is awesome on a laptop but SUCKS on a tablet. (Yes I tried living with it on my surface pro for 4 weeks. it sucks as much as windows 7 does and windows 8.1 does when using non touch apps)
So unless they fire all their management and design teams and start over with people that understand that the two ecosystems are different and need to remain separate nothing will change.
Proof that your touch UI and OS is crap when your users of your flagship device use a mouse and keyboard with it most of the time.