Question #1- Availability will come over time, bhphotovideo.com just put it up for pre order, and you should expect to see more retailers ready for shipment as time passes.
Question #2-Yes, all versions from the lowest model to the most high end, will have an IPS screen, an upgrade from the G750's TN panel. This should satisfy most customers, as colors are accurate as well as viewing angles being great. The screen is also Matte, in case you were wondering, and it can be adjusted to 100Hz in NVidia Control Panel, if you are interested.
Question #3-There are 2 2.5 inch slots, as far as I know. I haven't confirmed myself, but I've heard people say there should be an M.2 slots as well. So an SSD/HDD can be added later.
Question #4- I can't verify this, but Newegg says Nov. 4th is when it is available for purchase, but nothing so far says anything about shipping dates.
Question #5- Yes, every model will have the red back lit keyboard and red backlit logo.
Question #6- Any retailer will tell you, but being that we can't purchase it yet, we don't know.
I hope I helped! 🙂