Intuit has an app in Android Market for Quickbooks. This tool is used by many small and medium-sized business for all kinds of accounting. The port to Android/Linux will allow Quickbooks to run on any PC with an Android port. e.g. Android-x86 and dozens of smart phones and tablets. This breaks one more barrier to adoption of GNU/Linux by businesses. It will be particularly attractive to on-site or other mobile usage and allow accounts to be more up to date and accessible. Imagine a consultant being able to update his accounts on the plane or to answer questions more promptly.
Unfortunately, users find some features they would like are lacking. Presumably, Intuit will meet the needs of their customers.