From Ewan's Nokia Lumia 1020 review, part 1:
I think in many circumstances the Lumia 925 is actually the better all-rounder. For someone who wants a phone that is 'good enough' then the Lumia 925 can match up favourably to the HTC One, the Samsung Galaxy S4, and the iPhone 5.
But if photography is your thing, and that makes up a significant number of smartphone buyers, the Lumia 1020 changes the landscape dramatically (it's true that the Nokia 808 existed a year before, but with Symbian under the hood, Nokia didn't push it or even sell it in many markets - it was effectively a technology demonstrator).
We're fans of Windows Phone here (the clue is in the site name), but I genuinely believe that the average consumer will be happy with Windows Phone 8 as a mobile operating system. I know it gets short shrift from the geekerati, but that's how I see it. Take that competency and add on to it a camera that gives, frankly, stunning results, and you have a winner.
Will it be a best seller? Perhaps not, I suspect the Lumia 925 will have sell more units by the end of the financial year compared to the Lumia 1020 - but the Lumia 1020 is Nokia's great big, honking, flag waving, trombone playing, message delivering smartphone... "We're back", it screams "and we've got some pictures to prove it."
You can read the full 5000 word article here. It's worth noting that, by coming with Windows Phone 8 GDR2 out of the box, many of the little multitasking/background niggles which may have been putting off existing Nokia 808 owners have hopefully been fixed. Plus niceties like the always-on clock, double-tap to unlock, and more...
Suggestions welcome as to specific camera-related tests you'd like me to try in the course of preparing part two of this ongoing review.