I agree. This is a sub-page talking about a particular release though, so it's not a landing page or "front page".
Clicking the logo works and gets you to the project's actual front page (http://mesos.apache.org/), which has a decent description:
Apache Mesos abstracts CPU, memory, storage, and other compute resources away from machines (physical or virtual), enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.
That's still pretty abstract of course, but at least it's attempting to answer "what is Mesos?" first thing on the page.
Clicking the logo works and gets you to the project's actual front page (http://mesos.apache.org/), which has a decent description:
Apache Mesos abstracts CPU, memory, storage, and other compute resources away from machines (physical or virtual), enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.
That's still pretty abstract of course, but at least it's attempting to answer "what is Mesos?" first thing on the page.