WWG took gaming away from being exclusive to geekdom. The 90's saw a rise of a whole new class of gamerdom. Many WWG players in the mid 1990's in Alaska had never seen D&D, had never set foot in a store carrying it.
And it didn't suggest even a similar mode of play. 2E was just around the corner, and 1E was still recommending minis and/or counters on the map. So was traveller. So was STRPG1E, GURPS, Hero, Star Frontiers, Marvel Super Heroes, Car Wars, WFRP, and many others.
VTM emphasized a whole different approach to play: narrate everything. Lavish descriptions, no maps on the table. Focus on the emotions of the character, and the motivations. Background stories, not statues and/or pictures. Don't worry about the dice; don't impose minimum chance of failure, don't be afraid to say "yeah, you succeed" when it serves the story. Couple that with the distribution through the mainstream book trade, and it reached a huge, varied, and decidedly "Non-wargamer" crowd. (It also changed how I ran my games quite a bit.)
It's amazing how many of us old grogs were wargamers of one stripe or another. I cut my gaming teeth on family games. THen to AH Survival, and on to 1776 and Tactics II. Then to D&D... a very brief stint of Star Frontiers, and on to SFB & Traveller simultaneously (with the same group of players).
I have an interest in naval ships mostly from my cadet days.... Chugiak HS NJROTC. I've played the USN's NWC Naval Wargame of the mid 1980's... it's essentially Harpoon to an extra decimal place or two. (and most of the sensors are better than Harpoon indicates by a % or two.) I later got Harpoon, and understood why Cdr Bond got in trouble over it.
One of these days, I'll get to play Wooden Ships and Iron Men, Battlewagon, or Ironclads and Ether Flyers again. But I married one of those "new Gamers" who never did boardgames nor wargames. (She was a Hero System player when I met her; I was running WWG and WFRP...)