Olympus will release a firmware update for the OM-D E-M1 MFT camera that will add 4k video recording:
"To clear out some doubt, it was never a new OMD, it was always the E-M1 during the beta lab test with a beta firmware. That included all the new video features (4K, slow-mo, SLOG = updated colour creator with more values, higher bitrate, framerate control, etc…) it never has any heat issues with 29min limit recording with 4K + IBIS, it was exactly the OMD E-M1. The next OMD is not even on their plan, they had a financial issue and they need to make profit from the OMD E-M1, so what’s the best way – sharing a new firmware that includes interesting video features and boosts sales, or release a new camera and kill the OMD E-M1 sales? Let’s think about it, if they will release a new OMD right now, the Olympus company will die, it is not the right moment, the gear OMD E-M1 + new firmware update will boost both market (videography and photography) and more recently they had a strong interest towards the cinema industry, etc. They also sell the cinema industry slow motion camera etc. they know exactly where they go."