Maybe in the sense that SGML foreshadowed the open web -- but not really. AFAIK SGML was mcuh more open that this.
Granted, open isn't enough: wikis were a great idea, and while wikipedia might be one of this age's wonders of the world -- both stand on top of HTML and HTTP.
This is about as exiting as an office suite. Any old office suite. Not that people don't use office suites, it's just that it's broken tech, that locks people in caves. Bigger caves, yes, but still caves.
I wonder what had happened if they'd just made all of Lotus Notes Free software, rather than bundle it around in various zombie reincarnations?