Yes, the laser cannon is very interesting- I'm -pretty thrilled about it. However, I also think that this seemingly less impressive weapon will have a larger impact on warfare. Soldiers can attack their opponents with virtually no risk to themselves, when these others are similarly armed. With accuracy!
While it would be sweet if that laser was like a science fiction-styled raygun, I'm sure it's more like a big light beam that heats the missle to the point that its computer fries out or its payload detonates, rather than vaporising the missle in mid air. Then again, I'm completely speculating.