What kind of little details are you hoping for in ORAS? As far as remakes go I remember one of the things that stuck with me about HGSS was the ambient noise. No game has featured as much ambient noise as HGSS to date
>babbling water when standing near streams
>waves sound near the ocean
>wind sound in the first town
>branches breaking under foot in the forests.

I love that shit and was crushed when it didn't return in B+W. Since ORAS are the first remakes since then I've really got my fingers crosses for ambient sound design. I figure since remakes require less level and mon design they probably have much more time for immersive little details. What are you looking forward to?