The add-ons are in your system, but not yet activated. They have to be explicitly be activated by you, the customer, before their functionality becomes available.
The article, "Industry Solutions are now integrated into the SAP ERP Core", by Thomas Weiss, published in this month's issue of SAP Insider, explains further. Here's an extract from the article:
The Switch Framework and its different layers make the integration of SAP industry solutions into the SAP ERP core possible. Since all ISS are now developed in the latest ERP system and delivered one set of DVDs, this means lower TCO for you as customer; where you used to need two systems, you only need one.
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