During the last 18 years, I have practiced at many table tennis training centers in the US, Canada, Europe, and Asia.  In recent years, I have recognized four modern changes at the elite level.
 
Blocking with More Variation
In the past, one player would consistently block in a set pattern and the attacking player would attempt to loop 10-20 balls in a rally.  Now, the blockers have added more variation – sometimes harder, sometimes softer, sometimes flat, sometimes with a little topspin.
 
Multi-Location Blocking

 
 
Each year, you should take about 2 weeks and try to experiment with some new skills in your table tennis game.  During this time, instead of focusing on matches, focus on practice.  Try to play every day with a robot or training partner.  Here are some possible new things to try…
 
Distance. 
Instead of playing only 1 distance, try playing slightly closer to the table or slightly further back from the table.
 
Spin.
Instead of looping with the same spin, try to add slightly more or less spin to give your loops more variation.