I absolutely disagree with Vic Gundotra. Frankly, having previously worked at Google you'd think he'd have a better idea as to what's going on in the industry.
The iPhone is absolutely not the best smartphone camera out there. It's one of the best, but I'm surprised to hear such a strongly worded comment from someone who should know better. Google's image processing is second-to-none. In particular, once you've seen and used Google's HDR+ mode capabilities, you can't ever look back. Great low light capabilities, and virtually noise-free images in decent lighting. This is coming from my experience with the Nexus 6P which is nearly a year older than the iPhone 7 Plus. I hear the Google Pixel is even better.
I have used the iPhone 7 Plus camera as someone in my family has one, and I genuinely was surprised at how grainy (in low light) or soft (in good light) the images came out of the iPhone 7. Regarding the latter, Apple is far too aggressive with the noise reduction in their photos.
Also, in regard to the "end of the DSLR era" -- uhh, what? In 2017, DSLR buyers don't cross-shop with cell phones. As
@69Mustang said, the "beginning" of the DSLR era never even arrived for most people. DSLR's are generally used by professionals, and the only reason why their sales ballooned in the 2000's was because average joes wanted decent pictures that they weren't able to get with their cell phones. Fast forward to now, and anyone can get "decent" pictures with their cell phones, which means it's back to only the pros/hobbysists are purchasing DSLR's. Fun fact: year over year, DSLR camera sales are actually on the upswing this year.
- In regards to mirrorless cameras, the terms "DSLR" and "Mirrorless" are interchangeable in the above paragraph since they both appeal to the same market. When most people say "DSLR" they just mean a camera with a large sensor, mirror notwithstanding.