Hi @lopez_osc, as @Dmitry_Fedyuk shared, there was a pretty in-depth convo about this here: https://community.magento.com/t5/Just-Ask-Alan/M2-release-date-and-main-features/m-p/21059
There's a feature list here: https://info2.magento.com/rs/318-XBX-392/images/Magento%20Feature%20List%2011.16.2015.pdf, but for 2.0 EE here's a summary of what's new:
- Enriched product merchandising
- New responsive design reference themes
- A redesigned checkout flow
- Automatic recognition of registered customers in checkout
- One-click account creation
- Improved security and easier PCI compliance
- Redesigned Magento Admin user interface
- Drag-and-drop tools
- New step-by-step product creation tool
- Improved product importing and exporting
- Pre-integrated Varnish
- Minifying and building JavaScript and compressing images
- Caching all JavaScript and CSS in the browser
- Optional deferred inventory updates
- Extensive backend improvements
- Master databases for key subsystems
- Support for multiple slave databases and MySQL Cluster
- Modern tech stack
- Modular code base
- Extensive and more efficient APIs
- Service contracts
- Enhanced theming and layout framework
- Automated testing
- Easier upgrades
You might be interested in checking out the Developer Webinar we had for 2.0 GA: https://vimeo.com/149901366 or our Developer's Hub: https://magento.com/developers/magento2 if you want to dig a bit deeper.
Hope that helps! 