Lumia's got a gigantic phone-tablet called the Lumia 1520. It's not bad, and it comes from evleaks, who've historically been accurate for a lot of times. Now, we're wondering if it will ever come out.
Evleaks posted the image as "Nokia Lumia 1520, 2013", though we're not sure what's going to happen since Nokia now works for Microsoft.
Since the 1520 would presumably have more body room to work with than a smaller phone, it's possible that that implies a PureView camera. Here's hoping it gets real.