The Academy of British Cover Design (which apparently is a thing) announced their book covers of the year winners http://www.thebookseller.com/news/academy-british-cover-design-awards-winners-323818
Shortlist and winners are here: http://abcoverd.co.uk/
There is a special SF/F category but also some genre covers in other categories.
The winning SF/F design by Ben Summers is cleverly minimalist:
Of the non-genre covers, I found this one very attractive: