A million years ago (2009, actually), I did a post on How to Accent Windows - let's consider this post the 2014 version. Vintage paned windows are perfect for framing your plant collection for indoor and outdoor appreciation.
Make sure you pull the dead stuff off - that is of course if they're dried flowers. If you follow feng shui decorating practices, make sure you keep the energy fresh and the meaning special - don't let the dried plant simply become a dust collector/clutter.
Less than ideal view? Use the plants as a living wall. They're much better than keeping the blinds down or the curtains closed.
Lucky enough to have a window like this in your washroom? Block your sexy silhouette from the snoopy neighbours by hanging a plant in front of the window. Ferns love the humidity from the shower and if your window is facing east even better!
Indoor plants not your thing? Bring the outside in with a glass wall.
Strangely enough, plants love fluorescent light. Keep a little light on above the plant in the evening to give it a little extra oomph in the dark winter months.