The most significant changes are the slow motion video feature and the high speed shutter speed of 1/30,000, along with a new auto-focusing system. Sony has kept the compact size and who can fault it for keeping a winning formula?

Every year, point-and-shoot cameras march closer towards their extinction as smartphones continue to eat their lunch. The only way for a point-and-shoot to stand out and earn your hard-earned money is to come armed to the teeth with high-tech features your phone doesn't have.

It's 2015 and there's an argument that the compact camera is obsolete in the face of advancing smartphones. The Sony Cyber-shot RX100 IV is the absolute antithesis to that; a high-end, pocketable compact with large 1-inch sensor and 24-70mm f/1.8-2.8 equivalent lens.

The pocketable compact to beat; excellent image quality; built-in electronic viewfinder; fast aperture lens; customisable control ring

Hugely expensive; autofocus performance could be yet faster; still no touchscreen; limited bump over third-gen predecessor

Whereas its closest competitors, the Canon G7 X and Canon G5 X make you choose between an electronic viewfinder (on the G5 X) and a truly pock-sized design (the G7 X), the RX100 IV incorporates a high quality viewfinder that retracts into the camera when it's not needed.

An EVF, 16fps shooting and 40x slow motion are desirable features, but we'd have liked a touchscreen to speed up focusing, so it's four stars for Features & Build.

The Sony RX100 IV is a high compact really extraordinary range. It enhances the experience of the previous incarnation, especially in terms of operating speed and video capabilities.

It seems that Sony enjoys putting amazing technology in as many of its cameras as possible. It doesn't matter if it is a high-end or entry-level product, or if it is a professional interchangeable-lens camera or a compact camera. Sony likes to impress.

The RX100 IV is the fourth-generation of Sony's popular RX100 point-and-shoot cameras. This year's model costs $950 and comes with 4K video and slow-motion recording at up to 960 frames per second. It all sounds great until you use it. The RX100 IV looks virtually identical to the RX100 III.

Sony's RX100 is perhaps the most desired and groundbreaking compact camera of the decade. Every year, it gets better. But every year, it costs more. Is this latest model really worth $1000 A very small camera that takes very high-end photos.