http://forums.libsdl.org/viewtopic.php?p=38569&sid=9efbea827cdebd71ee430cda823bcdc7#38569
Descarga: http://www.libsdl.org/download-2.0.php
Cambios/Mejoras:
Full 3D hardware acceleration
Support for OpenGL 3.0+ in various profiles (core, compatibility, debug, robust, etc)
Support for OpenGL ES
Support for multiple windows
Support for multiple displays
Support for multiple audio devices
Android and iOS support
Simple 2D rendering API that can use Direct3D, OpenGL, OpenGL ES, or software rendering behind the scenes
Force Feedback available on Windows, Mac OS X and Linux
XInput and XAudio2 support for Windows
Atomic operations
Power management (exposes battery life remaining, etc)
Shaped windows
32-bit audio (int and float)
Simplified Game Controller API (the Joystick API is still here, too!)
Touch support (multitouch, gestures, etc)
Better fullscreen support
Better keyboard support (scancodes vs keycodes, etc).
Message boxes
Clipboard support
Basic Drag'n'Drop support
Proper unicode input and IME support
A really powerful assert macro
Lots of old annoyances from 1.2 are gone
Many other things!
Habrá que probar y ver!

Saludos!