I find it really difficult to tell which window will be selected when alt-tabbing through my window list on Unity8. The highlighting of the selection is very subtle and there is not change to the window preview or the icon. I thought it would get easier after using unity8 a lot but it really hasn't.
I think the following tweaks would make it much more clear which window is selected:
1) The app icon at the bottom should get bigger or some effect applied to it when the app window is selected. My eyes tend to look there as it's less cluttered than the window preview list
2) Make the border around the selected window preview thicker/darker to make it stand out more as currently the border highlighting is very subtle
And/Or
3) Make the actual window preview larger (or some other effect to make it move forward) for the selected window so that it's super clear which window is selected.
Status changed to 'Confirmed' because the bug affects multiple users.