Don't forget that a lot of the appeal of the FB's events feature is seeing who else is invited, who else is attending, the whole description and possible discussion that can also occur. Sometimes details need to be organised, comments made etc... I think it would also be cool and useful when uploading pictures to be able to tag an event so there is an album which people invited to the event can see and comment.
Sure, and I'm not arguing against any of that... I'm just saying that the way for Google to implement "events" is to thoroughly integrate G+ with GCal, so that you can do all those things. And I hope that's what they do, as I - for one - don't want yet another place that I have to pay attention to, to keep track of events.
Thankfully almost everything calendar related supports ical or some export format that Google Calendar can handle, or it'd be a real mess. :-)
