Hi Christophe. We generally do not comment on possible upcoming features or capabilities. I can say that we are constantly looking for new ways to allow our users to access and edit content in the way that is most convenient to them.
I would be pleased to have a chat with you on this topic if you like. If that sounds reasonable, contact me at email@example.com and we can set up a time.
I've been using MindManager for over a decade. I would also love to see a chromebook version. In point of fact, the only reason I have a PC (and don't use browser apps exclusively) is to run MindManager 2020 and Turbo Tax (and yes, I do know about the on-line version, so MM is really the only reason).