I am a long time Olympus user. When the Olympus OM-D E-M5 was launched in 2012, it was the first Micro Four Thirds camera, that really wanted me to switch over from my Four Thirds Olympus E-410 DSLR. The Olympus OM-D E-M5 is the first OM-D camera from Olympus to set new standards in the Micro Four Thirds segment and beyond. Although a mirrorless system camera, it had this classic vintage SLR look. In 2012 the Dpreview community chose the Olympus E-M5 as the best camera of the year 2012 in a user poll. Dpreview is one of the top photography websites in the internet with a very large community. The E-M5 won over cameras like the Nikon D800 and Canon EOS 5D Mark III.
If you have searched and clicked a link to this page you probably know about the still buy-able and affordable Sony A7 and you ask yourself if you should still buy it in 2018 or even make a switch away from Micro Four Thirds to full frame. To bring your problem to the point, is it still worth it to own or buy Micro Four Third equipment from Olympus or Panasonic when you can get a cheap full frame camera from Sony?
Update: The camera is released, it is certainly a very interesting release with a lot new introduced tech. But the price of 3.000 EUR is on the high side and we will see, if Olympus will sell it well. For me, no need to switch from my E-M1 but I am also not the targeted pro audience. Here I have a nice overview video of this cam.