Why did Olympus call the new pro flagship E-M1x ?

The new pro flagship for the Olympus Micro Four Thirds line has just been launched. Youtubers, bloggers are having their initial impressions published.

After running through a few of these, the question that I came up with is, why did Olympus call the camera the X ? What's your guess?

• It's X for Xtra Large?
• It's X for eXperimantal test rig to develop all the new tech without size or energy constraints and let that trickle down later to the other cameras in the line?
• It's X for eXtended OMD-EM1?
• It's to balance with eXtra long lenses? 

Here are the initial impressions / videos so far.  Come to MeWe and join in the community for friendly chats on Olympus gear https://mewe.com/join/olympusfriendsaustralia

From Robin Wong 

https://robinwong.blogspot.com/2019/01/olympus-om-d-e-m1x.html

From DP Review

From Peter Forsgard

From Tony Northrup

From Joe Edelman

From Creative Island Photography
https://www.creativeislandphoto.com/blog/olympus-e-m1x?fbclid=IwAR1K-IXx5GlCuslNiuj3fbZsdQnz8-VBOEtZo12mGb_RTsn5ocraKrYJOT8


From Mirrorless Lessons
https://mirrorlesscomparison.com/olympus-vs-olympus/omd-em1x-vs-em1-ii/

From Young-Sun Teh