Everything You Want to Know about Where to Sit on 787-8 true Polaris and PP version
The first new-Polaris bird is flying (ship 3908) so wiki may need an update. First five rows are pretty much like 787-10 I think. Rows 6-7 are in a mini-cabin behind Door 2. 6 is bulkhead (larger foot wells) and straight, 7 is angled.
Rows 20-22 are Premium Plus on this config, also in a mini-cabin.
Not sure yet how far E+ extends, official seatmap is not yet on United’s website.