That being said, if S-RAW has a resolution of 2736x1824, which is quite a bit larger than an HD resolution of 1920x1080, does it really matter if I shoot at 5M?
'HD' resolution is just a stepping stone for computer displays. Apple already have the 15" Retina MacBook Pro out with a 2880x1800 16:10 display. At 100%, S RAW won't fill that screen. It's only a matter of time before there's a 27" Retina display with an expected 5120x2880, and as this display technology becomes more mainstream, Windows will get native support for it too.
While you can rightly argue only a select few have this technology now, don't you want the moments you're capturing to stand the test of time?