Among the more obvious predictions for 2019, it's entirely likely that Apple will launch a new Watch around September time. This will be a year after the Series 4 and two years after the Series 3, so there are no prizes for guessing the new model would be called the Watch Series 5.

Apple will likely be keen to build on the move towards med-tech it made with the Series 4 and its ECG capabilities. But before that, Apple must seek certification for the ECG feature in more countries than just the United States. For now, despite the same model of watch being sold worldwide, the ECG feature can only be used in the US, where it has been certified by the Food and Drug Administration. Hopefully this certification will be completed by the EU and other territories before the Series 5 arrives.

Because the Series 4 introduced a refined form factor and a larger screen, we expect the Series 5 to remain almost physically identical to its predecessor, but with a more powerful processor, improved battery life - and hopefully sleep-tracking, which Apple is yet to officially offer.

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