Mount the tv to the left of the left hand window. Float the sofa across from it, two feet from the top wall.

Put a sofa table with two lamps and a dish to grab keys, etc. behind the sofa. Hang hooks or place a coat rack behind the door.

Move the desk across the room with the long side under the window. Slide the grey piece over to where the desk was.

You might consider moving the sofa to be centered in front of the window and put the chair nearer the door adding a pony wall height bookshelf (with its back to the chair), with or without doors on the entry side, between the chair and the door to create an entry; perhaps something like this:

http://thegamersforce.com/ikea-glass-door-bookcase/bookshelf-inspiring-low-bookcase-with-doors-bookcase-with-doors-ikea-dark-brown-bookcase-with-glass-glass-door-ikea-bookcase-singapore-ikea-glass-door-bookcase-ikea-billy-bookcase-glass-door-instruc/

A barrister style bookcase could also work.

Such a room divider would give you a place to add a lamp to the room.