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I don't realize that the latest version of CATIA V5R20 has been release early this year. It is already end of the year and probably CATIA V5R21 will be released soon. For V5R20, the latest update available currently is Service Pack 4 (SP4). Here I just want to share something about R20.
CATIA V5R20 includes new innovations such as:
CATIA ICEM Shape Design (ISD) - ISD R20 extend the advanced and powerful freeform surface creation, modification, and analysis capability within the Automotive Class A modeling domain.
Composite data in STEP format - Allow long term archiving of composite data especially for the aerospace industry. This function leverages the exchange of data between different CAD vendors. Users can greatly increase productivity with Light Manufacturing Part Generation which ensures that manufactured parts can be quickly created and synchronized with designed parts.
Imagine and Shape - For industrial designers, this function combines the curve-based approach with subdivision surfaces clay modeling. Beneficial to the styling centers/design studios transportation and product design industries.
Functional Modeling Part - Enhanced to address design processes of customers in powertrain domain as well as to support complex part design. Functional Modeling allows users to design oil pans, gear boxes, or motor brackets up to 40% faster.
CATIA 2D Layout for 3D Design - Allow users to cut a part along multiple planes. Then users can instantly visualize several internal features such as holes or slots in a single view to better understand the geometry and annotations.
SIMULIA Rule based Meshing - Automate the process of creating high quality surface meshing for all workflows that use CATIA meshing tools.
Information from Dassault Systemes: CATIA V5R20 Portfolio