Preview of 5.3

Let me present some of the upcoming things for 5.3.
Ground rules for how to discuss these things:

• Separate thread per topic. Please don't jam them together in a single thread.

However first, some important system requirements changes:

• XP Support for Editor is being dropped (Minimum is now Windows 7)
• XP SP1 support is being dropped for player / web player. SP2+ required.
• WP8,WSA8 support will be dropped (8.1 versions still kept)
• OSX 10.7 will be dropped for standalone player / web player (already dropped from Editor)

Now, on to the inbound changes coming:

• 2D Physics New Components & Effector
• 2D Placeholder Assets Creation Tool
• 2D Sprite Render Flipping
• Async Texture Upload
• Editor Test Runner
• Euler Import
• JSON Serialization API
• Host Migration
• LZ4 Compression for Asset Bundles
• MonoDevelop updated to 5.9
• Multi-Scene Editing
• OpenGL Core Support
• Particle System Upgrade
• Remote Frame Debugger
• SpeedTree Billboard Improvements
• SSRR

Added on Oct 12, 2016 (for b2 which was released on Saturday)

• In-App Purchasing

Added on Oct 17, 2016 (b3 arriving shortly)

• Multi-Display Rendering