This is a much awaited addition. Reopening closed tabs at once would save a lot of work and time. Especially when restarting windows or when I closed all tabs inadvertently.
Windows Jump List is not efficient in that.
It should't be difficult. Just make automatic saving of tab paths of the actual set (or sets) of tabs that are opened.
Something like Tab Session Manager in Firefox might help, but best option would be to make the reloading option automatic.
What do you say, Basj?