Its not just about games, its about general use of the phone, compare how fast a 1520 opens an app vs 630, the performance is noticeably smoother and faster.
and also the mention that it is a cheap devices? 350 euros is NOT cheap for a SoC 400 period, i dont care if it has a 50mp camera, and 2k display, if you are going to dump in a crappy processor which is as fast as an Asus Zenwatch, there is NO reason why i should pay that much for a phone.
Why can LG put a SoC800 in their nexus more than a YEAR ago and Nokia can't do it TODAY.
Its not just about phones that would last this generation, its about future proofing the phone for sales even after the phone stops production. Even if they jacked the price up and popped an SoC 800 under the hood, it will be considered a worthy competitor for many years to come. Not a phone that is already DATED on the FIRST day of release.
Who on earth thought this was a good idea, i mean really. This phone is a joke, Nokia should be ashamed of themselves. They took 2 years to make an 820 successor and its no faster than the older phone.
And also i must stress again, the general population is using Android, the general population is not going to "try" windows phone, if there is no compelling reason for them to buy a windows phone.