The new Olympus OM-D E-M10 III release has for the first time introduced for the line some sort of slow motion feature. While not much it should be noted that Olympus has the best 5 axis image stabilization in-body system when it comes to jitter reduction and overall look. Even while running or walking the camera does an admirable job.
The Panasonic GH5 has a similar system but Olympus still has the edge in performance by having much less shake with their patented solution. This is great for shooting video and this camera with 4k recording is probably one of the most stable handheld solutions for shooting UHD. The addition of a 720p 120fps mode while not ideal; is great to have especially if stabilized.