Benchmarks of Atom Z3580 in Dell's Venue 8 7000 tablet. It fares ok compared with the rest of the ARM world, although not up there yet. Battery life is rather good also. I see no reason for it not being implemented in more devices...
http://arstechnica.com/gadgets/2015...iking-tablet-that-falls-short-of-greatness/2/
http://arstechnica.com/gadgets/2015...iking-tablet-that-falls-short-of-greatness/2/