Lightroom: Allow a vertical filmstrip
Modern monitors have a much wider aspect ratio than the older CRT monitors. With the filmstrip located at the bottom of the window, the workspace provides a very limited view of the image being developed. Adobe Bridge allows the filmstrip to be configured as a vertical strip on the right side of the window; thus making much more efficient use of the workspace. Why can't Lightroom offer the same functionality? You don't have to reinvent the wheel; just adapt it to Lightroom.