We bought the RX100 MK4 to take pictures on our cross Canada trip. It is an awesome camera, albeit with some annoyances (menu system from hell). It's low light performance continuously surprises me, and it takes great videos as well as pictures. If you have watched my videos from Packwood Tour, they were taken with the Sony. The MK4 can take short slow motion videos up to ~1000 frames per second, and I love the OLED viewfinder. Oh, and it truly fits in my pocket.
If you get one, be sure to buy the add-on "handle" (a glue on piece of shaped rubber). Otherwise, the camera is no fun to hold.
The best part of life isn't around the corner. It IS the corner.