I had the 808 and loved the camera. Symbian and I had a love-hate relationship. It had all the features and the capacity to do everything I wanted. Unfortunately, it didn't do everything I wanted, and it was sluggish and what it did too. Now that is likely most attributed to the fact that it was no longer being developed, and that the hardware was significantly underpowered. Either way, I love the device, loved the camera, but got very frustrated with the software. I often found myself taking the Android route and trying to flash the device for that slight edge of speed, but never really got where I wanted and spent way too much time setting up the device over and over.
When the 920 came out, I said screw it and planned to sell my 808. I quickly upgraded to the 920, and loved WP8. Unfortunately, the camera was definitely nowhere near the 808, in spite having the PureView name. So I ended up not selling my 808, and I basically used the 920 as a phone, and the 808 as a camera. Finally, the 1020 came out, and my 920 was having more and more issues. The 920 was a nice device, but was definitely rushed to release. Without going too much into the flaws of the 920, after many replacements, the kind employees at the Microsoft store agreed to an exchange for the 1020, where I paid the difference. Good enough for me because I was sick of the 920 and really wanted the 1020.
Now that I have the 1020, I've found that the pictures sometimes have a very bad yellow tint that makes them look a little sickly, but some quick and simply photoshopping can fix that up easily, even if just "autocolor" is pressed. The question that remains lingering in my mind is - Can this device replace my 808 as a camera? To answer that, if you look at all the comparison shots online between the 808 and the 1020, I pretty much have the same conclusion. The 808 had, and still has, the best camera in any phone in most circumstances. Unfortunately, the phone (and I don't mean making calls, S60 was GREAT at that) portion of that equation is nowhere near the competition in terms of usability. What I have found is that the 1020 takes very close to the quality of pictures taken by the 808, but it excels in low-light photography (in agreement with many reviewers). The slow picture-to-picture time, I believe, is largely related to the procam app. If you use ProShot, you won't get the 34 MP image, but it is much faster (not at 808s level though). Also, if you use Manual Focus (in any app), the picture to picture time can be faster as long as you don't need to refocus.
In summary - the 808 is still Camera King in my book, and I am still going to hold on to it for camera purposes. However, I am going to leave it home most of the time because the 1020 is more usable as a phone and, in most cases, can get close enough for me as a camera. Also, thinking the 920 was a worthy replacement was a mistake - that was maybe an acceptable replacement for my N8...maybe.