apartment therapy changing the world, one room at a time

Try a rubber plant!

I don't think that wall needs anything, but the corner behind the chair could use a little panache. I'd replace the small blue glass lamp with a bigger/taller table lamp, one with some kind of red/orange shade or base, to pick up the orange dahlia print on the chair's cushion. You might then have to remove the hanging print.

Or leave it the way it is and add a small, white hanging mobile close to the corner?

Love the wall color, btw.

Another chair on the other side of the TV?

Rather than one or two large pieces of artwork - consider a gallery wall consisting of several smaller pieces.

And rather that leaving the lamp in the corner, I'd place it on a small table next to the chair where it could be used for reading.

The plant is too dark. Try something reflective to brighten the corner a little.

I would opt for a collection of prints and photos in a cluster above the armchair, possibly replacing the table lamp with a floor/reading lamp (something vintage of course) and adding some more collectibles and chachkes. The room is such an ecclectic space .. I LOVE IT!
I definitely think that you need some light in the corner where the plant currently is, and would consider using some sort of uplighting from the base of the plant to highlight it, which would also cast some nice shadows across that corner in the evening.

a sansevieria ('snake plant'), dracaena ('corn plant') or aglaonema ('chinese evergreen') would do fine with that light.

here's a list:
http://www.plantcare.com/encyclopedia/search.aspx?aq=1&type=-1&basket=-1&bonsai=-1&flowering=-1&foliage=1&fragrant=-1&purifier=-1&toxic=-1&environment=1&light=1&humidity=-1&care=-1

Ferns like the shade and tend to be survivors in my experience.

i love that wall color!!! why not put a shelf up with a few decorative books and a clock?

I think a plant is the best idea for that corner, but obviously one that can survive in lower light conditions. If she puts a full-length mirror behind the plant it will not only visually double the leafiness, it will also increase the light in that corner. In this case I think a plant with less trunk and more leaf would work best, so you don't have a reflection of a bare trunk. (I have a paradise palm in my kitchen with a mirror behind it and it looks great)

Aspidistras tolerate low light very well. They have long, tall leaves, and can grow to a decent height, maybe 20" or so (at least that's how tall my tallest one is). Also, if you happen to have cats, they are non-toxic to cats, which was a big deal for me. I ordered mine online from a nursery because I couldn't find any in my area, but you might have luck locally.

Move the small lamp from the corner to another room. Lamps in kitchens and bathrooms are unexpected and often great. Shift the chair a bit toward the window and place a floor lamp on the other side of the chair for height and better for reading. Nice room btw