Many types of filters are still important when shooting photos or videos. A Polarizer can reduce glare while increasing saturation and contrast. For videos and ND Filter can help control shutter speed while allowing max aperture settings.
Compact cameras like the Sony RX100 can capture great images but lack the ability to use such filters, unless you use an adapter like this great MagFilter solution by Carry Speed. The MagFilter is designed to work with any Point-and-Shoot style compact camera that does not offer basic threaded filter mounts. You can find the MagFilter available on eBay (found here).
Carry Speed MagFilter for Compact Cameras – eBay
You can also find the MagFilter for sale along with customer reviews on Amazon (found here)
Carry Speed, CPL Filter, MagFilter, ND Filter, Polarizer, RX100, RX100 Mark II
Carry Speed MagFilter for Compact Cameras – Amazon