Sway is a drop-in replacement for the i3 window manager, but for Wayland instead of X11. It works with your existing i3 configuration and supports most of i3's features, and a few extras.

Roadmap

1.0

Feature
Full IPC protocol support (#98)
Client mouse capture
HiDPI support (#797)
Modesetting
Drag and drop
Marks
Bind apps to specific workspace (#462)
swaybg/swaybar as shell surfaces (#450)
Mouse support for swaybar
Window borders (#477)
Most i3 commands (#2)
Tabbed and stacking window layouts (#556)
Keybindings via bindsym/bindcode
Multihead support
Input device configuration
Display hotplugging
Input hotplugging
X11 support via Xwayland
swaybar
swaymsg (IPC)
swaygrab (screenshots/video)
swaybg (wallpapers)
swaylock
Floating windows
Scratchpad
Window criteria
Clipboard
Gaps
RGBA swaybar, swaylock
Visual feedback from swaylock
Can't interact with certain modal views (#505)

Future

Feature
Touchscreen support
Rotating outputs
Restart in place
Saving/loading layouts as JSON
Multithreaded swaygrab video capture
Standardized permission granting system
Nvidia proprietary driver support