I will tell you one prediction I have made. If the media continues to cover this story on the cable channels 24/7 as they are currently doing, they will inspire other mentally unstable people to commit similar acts.
Of course this is an important news story that should receive significant coverage. The media does have a bias that favors the gun control side., however I feel that there should be some balance in their reporting.
In posts that I have made i have often said that if both sides of the issue were forced to sit down a table and hammer out some improvements to our laws, we would live in a better nation. Perhaps President Obama can use some leadership skills to cause this to happen.
I feel the changes will involve improving the NICS background check and finally providing some adequate financing to allow states to input data into the system on a more timely basis. It is possible that the manufacture of hi-cap magazines for public sale will once more be banned which will accomplish little or nothing as magazines are easy to change quickly. This "feel good" law will appease the gun control lobby. Another assault weapons ban will be considered but likely fail.
I also see some legislation to improve our mental health care in this nation. This might cause the insurance companies to provide better coverage for people seeking counseling for mental problems and would be part of Obama care.
I also see a movement to provide better security at schools and areas that are gun free and house large numbers of people. We spend an enormous amount of money on insuring that passengers who wish to fly are not carrying weapons or chemicals to make bombs. We can afford to take some of those funds to finance qualified armed personnel at schools and other gun free sites. This might be accomplished at the state level. I feel retired police officers would be good candidates for such positions.
I don't see any changes to laws about concealed carry which would have to be at the state level.
I will admit that perhaps only 10% of those who have a carry permit carry on a regular basis. I do and many of my friends also carry daily. However almost all of the shooters that I know who do have been shooting handguns for years on a frequent basis. If my estimate is right it would mean that 80,000 resident Floridians "pack heat" every day.