Sound idyllic! When ya gonna build it?

I would be careful with a wall mostly of glass....overheating in the summer, and huge loss of heat in the winter.
You could have the rest of the house insulated from the room with the glass, but then ya lose usable space.

Having a bolt on (but done in a way so it looks part of the design) conservatory on the south west side really works if done well. With openings in the top to vent in the summer, and an insulated wall between it and the house allows it to act as a large heat capturing device in the winter where the hot air can be taken into the house through small windows in the wall.

You can see Jonnie's house with the two storey conservatory which in even a little sun in mid winter can be quite warm. You can then use single glazing in the conservatory, whereas if it was part of your main wall you would need to use double glazing to ensure you didn't fail on the SAP calcs for building regs. You can see in the photo the openings at the top to let the hot air out in the summer.