Agree that papering both walls looks right in this room especially when curtains are selected, I would go with ivory sheers too. The mirror is a gorgeous feature but it seems to be in the wrong place in the room. A wider bedside table into the corner with lamps etc for height in the corner, mirror on opposite corner angled next to the dresser which could be moved to line up with the bed. Moving the bed over a bit more would give more space in front of the wardrobe. I have seen advice on placement of bedroom pillows (eg Sarah Richardson) that European pillow should sit in front of standard sleeping pillow with one or two smaller accent pillows. Looks very sumptuous and welcoming.

If the bed that you've ordered is grey as per the photo you posted, then I would go with light grey sheers to match the bed, wall to wall & floor to ceiling and yes keep the block out blinds on the vertical windows, I fear white/wall colour sheers will take away from that beautiful wall paper you got, and pick up those neutral tones that you like, including the carpet colour, in your accessories, bed linen, throws, cushions, etc... good luck and let us know how it all turns out :)

Beautiful view kalgansouth! If I read correctly the recess is to the left of the wallpapered main wall and out of sight until you are in the room? It depends on your overall scheme really & the recess is maybe meant to be for a dresser or bench so a mirror could be the best idea to reflect the view!

I like Siriuskeys suggestion....but also have a look at the Houzz article "this goes with that'. I think if you really wanted floral a small blue and white design could look ok...but I think it would much more interesting with a more geometric design instead. Room sounds like it will be lovely.