Roadmap

Remove concurrent selection types
Rather than separate saved and open tab selections, have just a single type
Copy / paste anything
Copy and paste tabs to saved or saved to tabs
Enable item copy
Right now, you can only cut items; this would allow copying as well
Add selection mechanisms
Such as select older, younger, same site, etc

Identify saved tabs in workspace
Identify saved tabs with some kind of indicator
Identify duplicate tabs in workspace
Identify duplicate tabs with some kind of indicator
Identify related tabs in workspace
Create rules to identify tabs by site, path, etc

Toolbar widgets
Widgets for duplicate tabs, audible tabs, quick access, etc
Quick-access tabs
Smart toolbar folders that would allow you to get back to tabs quickly
Favourite tabs
Save a list of tabs in a toolbar folder
Reminders
A way to close a tab, but check in on it after a set amount of time
Tabs info
A single place to see how many open / slept tabs there are, along with some simple tools
Audible tabs control
A list of audible and recently-audible tabs with additional controls

Duplicate tab management
Rules and tools to handle duplicate tabs
Tab budgets / scoring
Set a tab budget, get feedback on it, and potentially rules to
Housekeeper
A single place to manage all housekeeping tools
Onboarding Assistant
Help to set up / declutter your workspace when you first start using Control Space
Tab age / use analysis with tab cleanup
A set of tools to analyse long-open tabs and help you close / save them

Bookmark navigator
A proper bookmark tree!
Multiple bookmark roots
A way to choose only certain bookmark folders, vs one single root
Additional layouts for Saved Tabs
View in columns, tree, by date, etc
Additional controls for
History, navigation, sorting, etc
Back / Forward navigation for Saved Tabs
Jump forward and backward after changing folders

Add Search to Choose Folder dialog
A separate filter for the Choose Folder dialog
Add Search and Recent Folders to Save Tabs dialog
A separate search for Saved tabs

Better URL sharing / export dialog
A proper export dialog, with interactive options
Add session browser
A way to browse, restore and recover past sessions
Web page scraping
Set up scraping rules, then export data from selected sites

Consolidated Search Results panel
When searching, show Recent, History, Saved and Open tabs alongside each other
Support tagging saved items
First class support for tags, colours, etc
Search site using their search
Search sites (github, stackoverflow, etc) using their own search
Search tab content
Search tab's HTML content as well as their title / url
Search using rich search syntax
A richer search syntax rather than just "site title"

Improve "Sleep unused tabs" tool
Better control, rather than "the last hour"

Watched "Inbox" folders
Have Control Space watch a site and tell you when content has been updated
Bookmarks backup
Store your bookmarks in the cloud, and access them from any machine
Shared bookmark folders
Easily share bookmarks outside of the browser
Bookmark / tab comparisons
Can't remember this one!
Add multi-column organisation
Open multiple instances of workspace or bookmarks to drag tabs between them