I beg to differ - RPG's played via roll2d0 Fantasy ground etc are not different to those played FTF.

Personally I don't like TTRPG as DnD precedes Computer based RPG's by decades and also TTRPG makes me think or more wargaming derived skirmish games 7tv or even Force on Force and so on.

An industry is booming if you're buying their products, and people use the same books to play D&D whether they're doing it in person or using a virtual tabletop. I admit this is more true for roleplaying games than board games, because you don't really need to buy a board game to play it on Tabletop Simulator, but Roll20 definitely sells a lot of WotC products, with their own value add (virtual tabletop integration) on top of it bumping the price a bit. Which arbitrary point you choose to start considering them to be computer games isn't important when it's the same industry either way.