i think phil will look exactly the same for the next 3-5 years.
for that matter, i think bodybuilders will probably look largely the same on the whole until there is a significant new drugs/technology development. the sport started in the late 50s, and everyone looked pretty much the same until the mid-late 80s, at which point gh/insulin bumped the game up to a new level. i think we've seen that phase out to its limit, and until something new comes along, interest in bodybuilding will fall even past the already-pathetic levels it has now hovered at since the early 2000s.
i'm definitely no expert, it's just how things appear to me at this point.