Chris writes:

This is my real-world, in-depth review of the Olympus OM-D E-M1 Mark III. Specifically, I share thoughts and real-world applications of the new camera features on my recent short film Break Free. I highly recommend watching Break Free before watching this review: https://youtu.be/ge4SFdErgNI In this video, I also compare the E-M1 Mark III to the E-M1X and to the E-M1 Mark II and help you figure out which of the 3 is the better camera for you.

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Robin Wong compared the new lens vs the PRO zoom:

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Here is a roundup of newly published E-M1III tests:

Olympus E-M1 mark III in Costa Rica (SulaSula)
Hands-on by DC.watch
Olympus 12-45mm F4 Pro sample gallery (DPReview TV)
Olympus Announces PEN E-PL10 Mirrorless Micro Four Thirds Camera (Explora).

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Here is a roundup of newly published E-M1III tests:

Olympus OM-D E-M1 Mark III & M.Zuiko 12-45mm f/4 PRO Lens | First Look on Explora.
Olympus OM-D E-M1 III vs Panasonic G9 – The 10 Main Differences (MirrorlessComparison).
FIRST IMPRESSIONS OF THE OLYMPUS OM-D E-M1 MARK III (Olympus Imagespace).

The new Olympus E-M1III has been added to the FT matching simulator. This lets you see all possible camera+lens combinations.

And also CameraSize added the camera and lens to their comparison tool:

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Preorders:
E-M1III at Amazon, Adorama, BHphoto, GetOlympus. Olympus DE. Olympus UK, Olympus FR, Olympus ES, Olympus IT, Olympus NL.
Olympus 12-45mm at Amazon, Adorama, BHphoto, GetOlympus.
Olympus E-PL10 at BHphoto.

Here are all the E-m1III videos I found on youtube: