My new laptop is not touch screen and has Windows 8, and it works fine.
I absolutely loathe Windows 8, but not because of anything to do with touchscreen functions.
It's particularly a nightmare when you first start, because you have to learn to use a computer again - so much is different.
Of course it gets easier, but I don't see anything as better than before.
The Windows Mail e mail programme on W8 is awful, but I have managed to download Windows Live Mail instead.
If I could go back to an earlier Windows operating system I would jump at the chance, but it's not going to happen.