New Weapons of War

Railgun in testing from ships
This is the first step into post missile technology that involves kinetic rather than energy weapons.  All of this portends a new gap between modern military armament and that available to 2nd tier military forces.  

Smart Sniper Rounds
Self guided bullets are a worrisome thought since that means skill becomes less of an issue and over time if the price comes down it will be easy to get yourself shot on the battlefield.