Indeed cyberterrorism could be immensely appealing precisely because of the tremendous attention given to it by the government and media. Cyberterrorism also has its drawbacks. Systems are complex, so it may be harder to control an attack and achieve a desired level of damage than using physical weapons. Unless people are injured, there is also less drama and emotional appeal. Further, terrorists may be disinclined to try new methods unless they see their old ones as inadequate, particularly when the new methods require considerable knowledge and skill to use effectively.
Terrorists generally stick with tired and true methods.
Novelty and sophistication of attack may be much less important than assurance that a mission will be operationally successful. Indeed, the risk of operational failure could be a deterrent to terrorists. For now, the truck bomb poses a much greater threat than the logic bomb. They might see greater potential for cyberterrorism than the terrorists of today, and their level of knowledge and skill relating to hacking will be greater. Some might be moved to action by cyber policy issues, making cyberspace an attractive venue for carrying out an attack.