Transparency with alpha-channel
Loseless compression
Raster format
Smaller total download size
Less HTTP-requests
Extra calculations
Still raster format :(
Looks almost perfect on HD (2x) displays
Requires 2 versions of images
What about 3x, 4x, Xx?
Vector!
Support coloring
Not supported in some browsers and devices
Hard to position
No multi-colour support
Looks like a hack :(
Multi-colouring
Support for data:image
We still have IE8 (almost 3%)
Automation
All possible fallbacks (down to IE6)
Requires a bit of JavaScript
Foreground SVG images with interactivity and styleability
Responsive images with <picture> element