I can't say that I'm super-well versed with this bill (actually I haven't read it yet), but usually these "czars" aren't just for a short time. They are a permanent government feature. You know, like the Drug Czar - that position hasn't gone away.
The Patriot Act had an expiration act, and many of the provisions have already been overturned. The whole wiretapping was also deemed to be above the power of the President. The rest will likely be overturned in the next 2 years, with the possible exception of Homeland Security, as Congress and Obama do everything possible to erase everything that Bush did in the last 8 years, whether it was good or bad.
But I'm sorry, but I do see a difference between a possible terrorist attack (oh, sorry, "man-made disaster") and a computer attack. There are a bajillion ways for the people in charge of the computer systems to ensure the security of their own system. I guess if you do have a full "smart grid" that controls or at least tells people what they should do with their home electricity use
then it would have to be powered by a central system instead of many individual systems like they have now. Even if there were a cyber-attack, it would be very difficult for them to make a nationwide affect.