This plugin only allows Babel to parse this syntax. If you want to transform it then see dynamic-import-webpack.
There is also system-import-transformer in case someone isn't specifically targeting webpack or node. It can also generate the respective UMD pattern.
This plugin, nor any other is required if you are using webpack.
On Dec 3rd '16 (https://github.com/webpack/webpack/issues/3098) this feature became part of the webpack codebase.