To add,
I would not judge game completion by how much of the world is available to explore. I would base it solely on engine related things. Meaning, skills, stats, spells, etc. 1.0 will be when all of those things are finished and balanced.
If you include areas of the world, we'd still be at .1 or less. And that's simply not general practice on how things are done anyways. Take WoW as example. IF you wanted to base it on world content, seeming how they still don't have many areas of the game explorable yet that are all described from the extensive lore to the game, you'd still try to say that they should still be in beta, even after 5 years of open play, and 11 mil+ active subscribers.
even in a huge for profit company like Blizzard and WoW, the art is always the last thing and lags far beyond the engine. it's simply that time consuming. Sure, when WoW releases a new expansion, they throw in new engine related things, like new talents, skills, professions and what not, but the major content added is always expansion of the game world.
The way I personally view things, 1.0 is getting all the ground work done. from there, it's all about adding new areas. So say 2.0 is all of the first level is complete and open for play ( or maybe that will happen by 1.0) 3.0 adds in another level of the world to explore, and etc. form there.
regardless, the speed of releases, the quality, the content, all depends on the community. The more people participate and help build the world, the faster it is built. Going off of that statement, the amount of players getting involved and contributing to the project rather than simply playing the game and moving on when it gets stale for them has increased significantly. As Xil stated, it may not seem like it at the moment, but it will make itself shown soon enough. Simply a matter of time.
