Looks like this is going to replace the space shuttle.
A Space Shuttle alternative: Smaller, cheaper, albeit with far less hauling capability. A pickup truck as opposed to an eighteen wheeler.
The funny thing is that the original space shuttle was first designed to be that size, but the military kept pushing NASA to up the size until we ended up with a crippled expensive shuttle only capable of low Earth orbit. Now we've come full circle, with the military going back to the original envisioned size. The small size makes it easier to attain high Earth orbit, capable of going out beyond many satellites that other nations put out there. Makes those other nations nervous.