In the last two years, IBM has grown their Research and Development (R&D ) group for IBM Cognos Mobile from a small team to a larger, well-staffed team. They are now planning quarterly releases of new versions of IBM Cognos Mobile so that they can quickly release new enhancements to the market to meet their customers' increased focus on mobile devices. This additional investment in R&D is bound to mean quick advancements in the Cognos Mobile technology.
I do not feel that the goal of IBM is to replicate what competitors are doing, but rather to capitalize on their own strengths. Many people see third-party tools such as Roambi as competitors to IBM Cognos Mobile. I think that IBM will continue to allow Roambi to perform the functionality that it does well (allowing users to reauthor reports from Cognos BI data). IBM seems more focused on extending their own strengths, one of which is the ability to author once and consume anywhere.