Java 7 is faster in some cases. Also, some Java apps will require Java 7 — but obviously that doesn't apply to you if you aren't planning on using any new Java apps and those don't force an upgrade.

As a user it only makes sense to keep up with security updates, to use applications that depend on Java 7, the JIT compiler is also faster.

As a developer, even if some features got postponed to Java 8, it still has lots of nice new features to get your hands on.

Security enhancements, among other things.

Though, of course, you know better than clicking 'yes' on a random trojan installer, so maybe you don't need the security updates.

Java 7 has lots of enhancements for dynamic languages and some new things like NIO2 for asynchronous services (vert.x, for example, requires java 7)