Maybe its usefull to add that many gamers have 16:9 or 16:10 about 80% of all steam users use a 16:9 or 16:10 resolution as example [maybe more its all in the current hardware survey]. So its recommened to make ur native resolution for 16:9 and make some tweaks for other formats with the help of the mentioned ultimate fullscreen object. But you should note that some mini notebooks cant properly support higher resolutions than 1024x 768 [its probably a very small group o people using this though].
Without the ultimate fullscreen object resolutions by using the default fullscreen, which >wont< match your resolution (like you have 16:10 monitor and use a 16:9 resolution] could result in some stretching or slight picture deformation [depends on how different your aspect ratios are].
