It's definitely true that wargaming is stronger than it was in 1998, but it's still not a shadow of what it was in the 60s. Wargaming, as far as I know, has had a greying problem for a long time. Light Weuros are attracting some crossover boardgamers, but I'm not seeing those people moving into the historical simulations of actual wargaming.
I love Sakigahara, the COINs and most of the Mark Herman games, but I'm not moving any farther in that direction.
I dunno, I've been reading the book Playing at the World [0], and while in the 1960s, wargames and miniatures were at the center of hobby gaming, it seems to have more of a small-but-passionate fanbase. There was one major company that went bankrupt, and lots of small, transient publishers, gaming groups, and fanzines, mostly going into and out of business after a couple of issues.
Wargames got so baroque, I find it hard to believe very many people playing the 60+ hour campaign of Terrible Swift Sword. Although probably thousands of people have played Pandemic: Legacy, which itself will look strange in 30 years.
I love Sakigahara, the COINs and most of the Mark Herman games, but I'm not moving any farther in that direction.