The latest issue of X-Universe News updates us on the status of X²-The Threat (thanks YiYas). There's a rundown on the plot, screenshots, wallpapers, and more. There is also a status report on plans for a pair of demos:

We can tell you that there will be two demos of X².
The first will be a rolling demo which will include some benchmarks. This will enable people to not only see the game, but also get an idea of how it will run.

The second will be the playable demo. This will be released closer to the actual game and again, we can't specify a date for this yet as we don't have one confirmed.