It is a great GPU. I don't have a 1080, but I do have a pair of 1070s. The huge reduction in power usage along with the great performance, makes the Pascal cards great for BOINC.
The only things that it won't do well are MilkyWay and Prime GFN tasks. Those are double precision projects, and outside of some professional gear or an OG Titan/Titan Black, all of the NVIDIA cards since the 580 have had gimped fp64.
Welcome back to the team, and enjoy the new gear.