Just FYI, you can get a free preview version of Office 2013 here: http://www.microsoft.com/office/preview/en
I am trying it out. Don't notice any big changes to Access yet.

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Reply from Richard Rost:

I haven't looked at it yet, but from what I've read online there doesn't seem to be any major differences on the FRONT-END of Access... just back-end stuff like enhanced SharePoint integration, SQL Server migration, etc. Keep me posted if you notice anything cool!