I can only answer questions in this area from already published material (public knowledge). I can not tell you my predictions that is too close to reality. Because I have worked in certain secure projects in the past and did work for a company who did heavy work in these area. Though technically I can say anything (there is no legal basis) it is not a good idea because this is an open forum.
Here is why: Suppose you are a physicist or a nuclear engineer. Even though you have not worked in a secure environment, you could easily deduce how to build a bomb (even the very word is scanned by UncleSAM). Now if you put that on the internet that will cause some serious problems.
It happened to me several years ago. I inadvertently put my own chemical formula of a certain item on a company document that was not stamped 'Classified' (because I made it up). I was investigated thoroughly to see how I found out about it because the formula was close to the truth. Finally they said that even though it was my idea, I can not tell anybody without a proper security clearance. So from that time on, I stay away from the oxymorons (military intelligence) as far as possible.
Having said that, a lot of information gets leaked out purposefully from the establishment to either get funding or to scare our opposition or to send our opponent in wild goose chase. If you list the area of your interest and specific items, I can comment on it.
If you read the Darpa bids over the last 3 years, you will get a flavor of what is going on. That does not mean it will happen. There is too much politics involved and the red tapes.
In energy weapons, they are tinkering with lasers to make it more powerful. Unless some general writes a check of say 100 million dollar to do the next generation energy weapons, it will not happen for a while - because those things require faith to execute not 100K prototype.
Today we have the technology to blow one or fifty missiles out of the sky. So energy weapons is not a problem. But we do not have the weapons yet. Target acquisition is not a problem. Finally our military is catching up with civilian technology.
Passive Energy shielding is a problem. No one has any idea what it is a la Startrek. That that is not going to happen for quite sometime. The best solution is to have several expert system based particle cannons (for the lack of a better word) with a computer link to attack the target. Note: any public research is no good unless you are into the technology itself for obvious reasons.
If you speculate, I will tell you if it is valid or not. Sorry, being so long winded....