Yes, Nokia 8 does have Always On display.
No. Nokia 8 does not have wireless charging. However, we are expecting that soon you will be able to buy some third party accessories to charge your Nokia 8 wirelessly.
You can use nano-sized sim cards in Nokia 8.
Yes, Nokia 8 does have OIS.
It’s safe to say that if a smartphone like this had shipped from the Nokia stable a few years ago, the Finnish company might never have had to step back from the mobile business.