Microsoft has defied industry rumblings suggesting it would unveil a Surface Book 4 at its September 22 Surface live stream, choosing to unveil a new Surface Laptop Studio in its place.

While the fabled Surface Pro 8, Surface Go 3 and Surface Duo 2 made an appearance as expected, the Surface Book 4 was a no show, leaving many wondering about the future of the series.

Here’s what we know.
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