Maybe now that they are entering the VR market we might see some VR experiences from them again. I always wondered what the hundreds of engineers they employ do since it has been more than a decade since Portal, Left 4 Dead, Team Fortress etc came out.
EDIT: They didn't even bother to keep their source engine updated and appealing to use. Source 1 was used by many big titles back in the day. And Source 2 was was really really big among modders. Lost opportunities, but seeing how well Steam did, why would they bother.
I believe they could have eaten both Unity's (keep updating source engine) and Discord's (adding built-in chat/video to steam) lunch with ease, if they tried to do so back then.
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Blizzard is in a similar position. Starcraft 2 kinda failed to pick up as much steam as the first one did. Diablo 3 was... umm.. remember the real money auction house? And of course they kept milking WoW for as long as they could (predictable). What comes after? Oh right, licensing popular Chinese mobile games and rebranding them as "Diablo" to be released in the west. Mama Activision is making deals with companies like Fromsoft for being the distributor of refreshing games like Sekiro. It's all a big strategic play.
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I kinda envy and admire companies like Rockstar games. They enter a period of a 7 year silence, and come out of it releasing Red Dead Redemption 2, which for all the criticism it has gotten, is fantastic on all levels. Technical and artistic alike.