Two very different new cameras were released this week that are able to shoot in 240fps Full HD 1080p. One is the Fujifilm X-S10 which is an all-rounder mirrorless camera with 6 stop IBIS and cinema video profiles for $999 body only, the other is the sequel to the very well received DJI Osmo Pocket now named DJI Pocket 2 dropping the OSMO part of the name & starting at $349 in its most basic form. Slow Motion on DJI Pocket 2 & Fuji X-S10 is close on both.
Both cameras are able to do 120fps as well but the interest peaks at 240p where the speed makes things moving slower more detailed, especially people as at that speed lifeforms moving relatively slow are excellent subjects. For faster animals like birds or flying insects, you need many more frames per second, usually in the 700+ range to create a good enough effect.