Chrome New Tab Page Different/Changed. Samsung Tab 3, Android Kitkat
I believe your installation was selected for the experiment (aka field trial). The Chrome team sometimes rolls experimental features to a limited number of users (like 2% of all installation). Then they gather some statistics to see how this feature performs. The new style of the new tab page seems to be one of those experiments. You can turn it on (and off) via chrome://flags page in your browser (search for enable-new-ntp).