Maybe I can help put your mind at ease - the cameras in the iPhone 7 are not very impressive at all.
First, they use much smaller image sensors than the Pixel. The iPhone 7 Plus uses a 1/3" sensor for the wide camera, and a 1/3.6" for the telephoto camera. Small sensors are bad at gathering light, and you can only fight physics so much. The Pixel's use a 1/2.3" sensor, the same size found in many point & shoot cameras, and other high end non-apple smartphones.
Second, the Pixel has a much better HDR implementation than the iPhone, and it's instant. The Pixel can take as many rapid-fire HDR's as you want with no shutter lag. For most people wanting share-ready photos that look great straight from their phone, this is a big deal.
Third, the Pixel has much better video stabilization. It's eerily good, and there are plenty of videos on the web demonstrating it. It's so good that it makes the video look like it's shot from a tripod when panning, which you may or may not want depending on usage. There is also no 'jello' effect.
Fourth, the optical quality is much better. The Pixel isn't in this comparison yet, but you can see in this comparison between the iPhones and a Galaxy S7 that the quality is shockingly poor on the iPhone 7, especially in the iPhone7 Plus. Move the little box around to see different areas of the image:
https://www.dpreview.com/reviews/im...05&x=0.9434981125643354&y=-0.5134560965857144
Fifth, the ISO performance on the iPhone 7 is quite poor. In all the samples I have seen including professional testing on DPreview and other websites, anything above base ISO not in good lighting looks like a pastel painting. Their noise reduction algorithms totally destroy the image if you look at them with any kind of scrutiny. In fact, the ISO performance is so poor on the iPhone 7 Plus telephoto camera, that the phone actually uses a crop from the wide angle camera instead when you go above a certain ISO, because that sensor is larger than the telephoto sensor. The reason this doesn't happen on the Pixel is twofold. First, the sensor is significantly larger and it can simply gather more light, which improves low light performance. Second, because the high ISO images are really several images merged, Google's algorithms are able to eliminate most of the noise (because noise appears randomly in an image) while keeping the photo relatively sharp and free from the heavy noise reduction that results in a pastel-looking image.
This is a good article on the sensor used in the Google Pixel/Pixel XL and how it's different than the 6P sensor:
Sony IMX378: Comprehensive Breakdown of the Google Pixel's Sensor and its Features
Finally, the Pixel offers unlimited, free, full resolution photo storage even for 4K video. Apple charges $10/mo for 1TB of storage, and doesn't offer an unlimited option as far as I know. If you take lots of photos and 4K video, it doesn't take long to hit 1TB.
Hope that helps. Honestly the iPhone 7/7+ camera is nothing special and I don't understand the hype around it. They are using smaller image sensors than all the competition, and still somehow can't get rid of the camera bump. They aren't the first with a dual camera setup either.