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According to your specs 1600 x 900 is the native resolution and hence, the maximum resolution of your display. Even though your graphics card may support 1920 X 1080, you can not make a screen that is 1600 x 900 display at 1920 x 1080.
If you put a Blu-ray movie in which has been recorded at 1920 x 1080 then your graphics scales this to you laptops native resolution which is fixed at 1600 x 900.
If you want to check and see what the actual resolution is, type in "System Information" , with out the quotes in the search box and click on what you see in the screen shot.
The screen shot is of my dv8 which has a fixed native resolution of 1920 x 1080.
As for the movies they are filmed at an aspect ratio of 2.39:1 for "The Tourist"
http://www.blu-ray.com/movies/The-Tourist-Blu-ray/
and "The Postman"
http://www.blu-ray.com/movies/The-Postman-Blu-ray/
What this means is that you will have the black bars on the top and the bottom and this is normal. You can't do anything about this when watching a Blu-ray on a computer. If the movie was filmed at 1.85:1 like "Contagion", then it would fill the screen.
http://www.blu-ray.com/movies/Contagion-Blu-ray/29
Look under video and it tells you this and in this case it's slightly smaller because when it was transferred to Blu-ray they changed it to 1.78:1.
When I play The Tourist or The Postman on my dv8 I have the black bars as well.
LG made stand-alone Blu-ray players at one time where you could zoom up a Blu-ray to fill the screen. When this is done you cut off the edges to get rid of the black bars. Most Blu-ray players can't do this as all Blu-rays are HDCP (high definition copy protected) and I don't know what LG did to get around this.
Most directors don't want you zooming up their movie and the protocol to keep you from doing this is imprinted in HDCP.
There are a number of displays that will allow you to zoom up the picture, but as I said a computer will not allow you to do this.
Here is a screen shot of "The Way Back" shot at 2.39:1 played on my computers 16x9 screen. The black bars are pointed out with red arrows.
