You are wrong… The Core M is almost exactly 2x more powerful than X7 Z8700 (the Atom CherryTrail superior version). A pair of benchmark comparision examples between Cube i7 Stylus (Core M 5Y10c) and Surface 3 (X7 Z8700):
– 3D Mark Ice Storm:
Cube i7 Stylus: 39897 Surface 3: 22449
– 3D Mark Cloud Gate:
Cube i7 Stylus: 4029 Surface 3: 2030
– Geekbench 3:
Cube i7 Stylus: Single Core: 2034 Multi Core: 4221
Surface 3: Single Core: ~950 Multi Core: ~3050 (consulting Geekbench 3 web scores)
Benchmarks extracted from my Cube i7 Stylus review http://www.htcmania.com/showthread.php?t=1041782 and Anandtech Surface 3 review http://www.anandtech.com/show/9219/the-surface-3-review
And Core M processors supports a lot more instructions sets than Atom CherryTrail ones…