The article focused on Windows Live Mail and the sync protocol that MS will implement in Outlook.com (late June2016)
Since you don't use WLM - you can probably ignore the article.
I believe IMAP and POP3 protocols will still be supported, just the sync mechanism will change. That's only my opinion though.
A member said, as far as they knew, that eM Client supports the EAS protocol - Outlook.com will change to use that sync protocol late June 2016).
I looked at the eM Client site and saw that it supports the EWS protocol.
That's as far as I went.
I don't think you have to do anything to accommodate the change if you connect IMAP or POP3 and you don't have to do anything right away. I'm sure there will be more inofrmation in the next couple of weeks.
If you sync Contacts or Calendars - you might have to switch eMail clients. The only two clients mentioned in the article were
MS Mail App (free)
MS Outlook ($$)