Every time this discussion comes up someone mentions that R/S remakes are not viable as i is the worst selling main series game. So what? A main series title, remake or otherwise is going to sell well.
And then people mention the flaws with the games, "too many water routes", "too many trumpets in the music", etc. Things that a remake could fucking -fix-. Hoenn is easily the most varied and scenic region and it would look great as a fully 3D world. Not to mention it introduced so many advances in gameplay and deserves to be remembered for them.
Lastly, Game Freak is known to have 2 teams working on games concurrently. HG/SS were developed while B/W were in dev, B/W2 began while B/W were late into dev, X/Y most likely began dev when B/W2 were late into dev, etc. So unless these teams merged to work on X/Y, which admittedly is highly possible, it is not going to take away from anything.
Conclusion: there is no reason to believe GF won't remake R/S. Lay this fucking argument to rest already.