List of SP2013 improvements

My SP2013 Favourite Changes
This list is just random thoughts pls add your comments and I'll make it longer.

1. Delta's for Document management (don't use a full version for each version of an Office document),
2. Sparse columns,
3. WCM (cross site collection navigation OOTB, improved publishing & page size options),
4. Search is 1 product (FAST & SP Search),
5. App model (development options are more numerous),
6. REST (OData) is a 1st class citizen - improved access to REST API/external access to services such as search,
7. .NET 4.5 instead of .NET 3.5 (Workflow is a big winner),
8. Workflow (Workflow in SP2010 is better than MOSS) but performance and architecture is greatly improved,
9. Side by side Enterprise and standard edition CAL's to lower TCO,
10. Sticky sessions no longer needed - distribute cache is shared,
11. SharePoint 365 is awesome,
12. People search is even better with less customisations being required - OOTB it does more,
13. UPS has 3 sync options in SP2013 as opposed to 1 method in SP2010 - the simpler AD sync and an option to link to FIM (beautiful),
14. Improved OOTB pdf support,
15. SkyDrive Pro 2013 replaces Workspace (may not be good but I do like SkyDrive),
16. OWA is a separate product not bundled with SP2010 as a Service Application.
17. Licencing (simplified and cheaper, OWA is free.  Search which is the FAST replacement is part of SP2013.  There is no longer a separate Internet (FIS) and Internal SP Server licence.)
18. Search-Driven content
19. Search Provides html previews without OWA.  OWA adds previews/thumbs for search results on Office documents.  I believe pdf can also be setup with some work.
20. Search has REST API that support requests in both Keyword Query Language (KQL) and FAST Query Language (FQL).

 Comparison of the SP2013 On-Premise editions