What's the future of Garry's Mod?

In my opinion Garry's mod is dying. I used to see a lot of people on DarkRP when I get on around Mid-Day(EST) and now I see about half of what I would usually see. Every game dies out one day no matter what. One way to kinda well save Garry's Mod is for Valve to make a HL3 and use what they have from that to make a Garry's Mod 2. I really want to see one tbh.