My team master always says that Oracle was left behind in the BI world because they don't have good visual tools over the OLAP cubes. Microsoft, for example, has good visual tools such as Panorama. Today I've seen that they have beautiful visualations over relational DBs which called
ADF Data Visualization Components. The problem is that these tools can't look over OLAP cubes. In this link (look for Oracle OLAP Q&A) you can see what we'll see from Oracle in the future: These visual components will be able to show OLAP data. Maybe that will make Oracle really be able to fight Microsoft in the BI scene.