Dropbox Paper

Notion's novelty according to me is the fact that everything can be a potential document. Notion's as a product has two very contrasting features. One as a hybrid document editor that combines the goodness of Markdown of Dropbox Paper with a more extensive set of formatting blocks. The second as a task manager and an organizer like. Trello.

Every table on Notion can have multiple views saved for previews with different filters, sorting and table style applied. Also, elements in a table can also be a page making it easier to have a Kanban-style sub-task manager for a particular subtask on a Kanban board for your project.