Elevating the discussion and providing more information...
The reason I am asking this is using a web service means creating more data management code. If I have written my plugin appropriately, I should already have working data management code separated from the display code. Ideally for my mobile integration, I should only need to call the existing data management code, with perhaps some pre-processing code to reformat the items that come from the mobile app, and the redirect the output to the mobile app output template code.
So what am I missing by not using the web services?
The reason I am asking this is using a web service means creating more data management code. If I have written my plugin appropriately, I should already have working data management code separated from the display code. Ideally for my mobile integration, I should only need to call the existing data management code, with perhaps some pre-processing code to reformat the items that come from the mobile app, and the redirect the output to the mobile app output template code.
So what am I missing by not using the web services?