I think this is the first time a company updates the camera manual including the new firmware features info. The “new” E-M1 manual can be downloaded here:
English:
www.olympus.co.jp/en/support/imsg/digicamera/download/manual/omd/man_em1_ver2_e.pdf
French:
www.olympus.fr/site/rmt/media/consumer/pim/_manuals_aw2014_/E-M1_MANUAL_V20_FR.pdf
Thanks J-Marc for finding the news!