readme: update installation instructions

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

README.md

@@ -45,12 +45,11 @@ Key features:
 
 # Installing
 
-Using `buildx` as a docker CLI plugin requires using Docker 19.03. A limited set of functionality works with older versions of Docker when invoking the binary directly.
+Using `buildx` as a docker CLI plugin requires using Docker 19.03 or newer. A limited set of functionality works with older versions of Docker when invoking the binary directly.
 
-### Docker CE
+### Docker
 
-`buildx` comes bundled with Docker CE starting with 19.03, but requires experimental mode to be enabled on the Docker CLI.
-To enable it, `"experimental": "enabled"` can be added to the CLI configuration file `~/.docker/config.json`. An alternative is to set the `DOCKER_CLI_EXPERIMENTAL=enabled` environment variable.
+`buildx` comes bundled with Docker Desktop and in latest Docker CE packages.
 
 ### Binary release
 
@@ -63,13 +62,8 @@ chmod a+x ~/.docker/cli-plugins/docker-buildx
 
 # Building
 
-### with Docker 18.09+
-```
-$ git clone git://github.com/docker/buildx && cd buildx
-$ make install
-```
 
-### with buildx or Docker 19.03
+### with buildx or Docker 19.03+
 ```
 $ export DOCKER_BUILDKIT=1
 $ docker build --platform=local -o . git://github.com/docker/buildx
@@ -77,6 +71,12 @@ $ mkdir -p ~/.docker/cli-plugins
 $ mv buildx ~/.docker/cli-plugins/docker-buildx
 ```
 
+### with Docker 18.09+
+```
+$ git clone git://github.com/docker/buildx && cd buildx
+$ make install
+```
+
 # Getting started
 
 ## Building with buildx