Window treatment will not work with your space. Maybe put your stuff away and add some homey touches like a little herb planter and some ceramic pieces. Why is your window so dark with all the white trim and tile? I love the pendant where did you get it?

I think a woven roller blind would be best for your space.

if you want a bit of night time privacy the woven roller blind suggested by lori would do the trick.

You have a beautiful kitchen, but if you really want it to look good, you really need to clean all the clutter off of the countertops and just display the things that you need for everyday use. It looks like you are in the process of packing to move. It's hard to really appreciate the beauty of your granite.

Once you have cleaned up all the unnecessary clutter, post another picture. It will be easier to see what kind of window treatment would work in your space. I'm guessing that roman shade would work best.

Better but whats in all those cabinets? What do you use everyday? Do you have a pantry? Put it all away and wait to see what gets added back because you need it.