To configure Secure Store, you perform the following steps:

1. Register a managed account in SharePoint Server 2013 Preview to run the Secure Store application pool.

2. Start the Secure Store Service on an application server in the farm.

3. Create a Secure Store Service service application.

To run the application pool, you must have a standard domain account. No specific permissions are required for this account. Once the account has been created in Active Directory, follow these steps to register it with SharePoint Server 2013 Preview

To register a managed account

1. On the SharePoint Central Administration Web site home page, in the left navigation, click Security.

2. On the Security page, in the General Security section, click Configure managed accounts.

3. On the Managed Accounts page, click Register Managed Account.

4. In the User name box, type the name of the account.

5. In the Password box, type the password for the YourDomain\ServicePool account.

6. If you want SharePoint Server 2013 Preview to handle changing the password for the account, select the Enable automatic password change box and specify the password change parameters that you want to use.

7. Click OK.

All the steps you needed to install and configure SharePoint 2012 Preview in Windows 7 operating system

http://virtualizesharepoint.com/2012/07/23/install-sharepoint-2013-in-virtual-machine/

- Visual upgrade
- Document Workspace site template
- Personalization Site site template
- Meeting Workspace site templates
- Group Work site template and Group Work solution
- Visio Process Repository site template
- Unghosting and customizing CSS files
- Imaging Web service
- Excel Services — Can’t edit workbooks in the browser that have external data connections
Read More:
http://technet.microsoft.com/en-us/library/ff607742(v=office.15)

Steps by steps video instruction about installing SharePoint 13
Install SharePoint 2013 – Video 

SharePoint App Market Place

SharePoint Apps will support multi-tenancy. It appears that Apps will support both sandboxed and farm solutions.

Work Management Services

Work management services handle tasks assigned to users. From my cursory understanding at this point work management services provide extended capabilities for managing, creating, reordering, deleting, and creating tasks, as well as synchronizing tasks with other platforms (at least Exchange is documented).

Content Management Service

The Publishing service lives on – now under the Content Management service, along with features such as managed metadata, document transformations, and the aforementioned eDiscovery.

Minimal Download Framework

Briefly what the MDS does is that it allows users to load only what changes between pages. This drastically reduces page load time and speeds up responsiveness for the entire application.

Javascript Rendering of Forms

New here is the addition of a JSLink attribute on SharePoint 2013 forms. According to the documentation, the JSLink attribute specifies the script used in rendering the form. JSLink may prove to be an easier way to add scripts to a form rather than having to resort to jQuery making client side customizations easier

SharePoint Education

SharePoint Education aims at satisfying educational institutions’ needs for a collaborative and educational environment. It seems to target the needs of both faculty and students, and supports features such as:

• academic documents, likely books, articles, and so on
• communities, a new grouping mechanism, ‘parent’ of courses
• courses, a collection of academic documents, assignments, and lessons
• assignments, including assigning assignments to individual students
• events, possibly real-time lectures and assignment deadlines
• meetings, including recording of online meetings and meeting schedules
• grades, numeric or non-numeric (letter)
• quizzes

Source:
http://www.bibamusmoriendumest.com/?p=33

SharePoint 2013 Beta Screenshot

Source:
http://timursahin.wordpress.com/2012/03/20/sharepoint-2013-sharepointvnext-hakkinda/