What’s New in Pho­to­shop (Extended) CS5.1 — Is there a new Pho­to­shop CS5.5?

Actu­ally, Photoshop’s revi­sion offi­cially remains at “CS5″ for this release, but under the hood it gets a minor upgrade to CS5.1 (ver­sion 12.0.4) and comes with CS 5.5 suites…

Adobe Photoshop Touch SDKAdobe has updated its inter­nal script­ing engine to open the door for appli­ca­tions and devices like iPad, Android, and other com­put­ers to drive and com­mu­ni­cate with the desk­top ver­sion of Pho­to­shop CS5. A new cross-platform Pho­to­shop Touch SDK (Soft­ware Devel­op­ment Kit) will enable devel­op­ers to take advan­tage of these func­tions. Learn more about the Adobe Pho­to­shop Touch SDK.

This new capa­bil­ity pro­vides a direct link between Pho­to­shop CS5.1 and mobile devices and tablets, allow­ing the cre­ation of com­pan­ion apps. Some exam­ple apps: cre­at­ing paint­ings and sketches (Adobe Eazel) or mix­ing col­ors (Adobe Color Lava) and see­ing these results back in Pho­to­shop, con­trol­ling Photoshop’s tools using the iPad as a new input sur­face (Adobe Nav), and so on. This expand­abil­ity lets you work directly with your iPad to boost your in-the-moment cre­ativ­ity and inspire your best work. Read more + watch a demo. For a big­ger upgrade to Pho­to­shop we’ll look to when CS6 is released. Note that CS5.5 will have no impact on the Cam­era Raw plugin

No change in Illustrator …

source: http://prodesigntools.com/adobe-cs5-5-upgrade-overview-whats-new-each-product.html#Photoshop.