Yes there have been changes implemented suddenly after the attempted bombing on that plane from Amsterdam over Christmas.
The restrictions will depend on where you are going. Make sure you check with the proper authorities for the country you are going to be visiting.
Based on what I have seen so far, there have not been too many changes when travelling in or from the US but when you come back there may be baggage restrictions and time-consuming extra security measures. For example, when travelling to the US from Canada you are limited as to the size and type of carry-on you can have (actually officially you are not even allowed carry-on baggage but then there are all kinds of exceptions), You can't have carry-on with wheels. So, if you don't do your research you might fly to wherever you're going with certain bags but then not be allowed to return with the exact same bags. Also,when going through security you will be subject to a body scan or a pat-down.
Keep watching as the time for travel approaches as restrictions can be modified.