I'm sure kernels with GC are on their way.  I think they already exist in research contexts.  As for games, the problem seems to be that the market will not pay enough for hardware to do a good job. so the attitude is "So what if it crashes, it's just a dumb game."

The last C program I worked on was an interpreter for the Joy language.  It had a precise GC for objects, but strings were a mess.  I added libgc and ripped out all the half-assed solutions.  If I had to write C today, I'd write it with libgc.