My main thing is arcades and unfortunately without any Atari on the market these days, that limits discussion there. But for new arcade stuff, there is plenty going on.
There is an annual trade show called JAEPO that takes place every February in Japan. Here, all of the game makers for the market there show off their latest ideas, games and tech. The event has a strong focus on VR this year but many amusement places / arcades aren't really jumping on the bandwagon yet as amusement VR is still expensive, you need an attendant to watch the game/help people and earnings are not showing amazing ROI.
Here is news that I've compiled for JAEPO so far: