Minecraft's yearly showcase stream took place this evening. As part of the show, Mojang showed off some of the future updates coming to the game.
First up: the Bundles Of Bravery update, which will add a proper hardcore mode to Bedrock Edition, as well as bundles, which will allow you to carry more items in your inventory when out adventuring.
Hardcore mode adds permadeath to Minecraft, giving you just one life to live and automatically generating a new world when you inevitably succumb to a creeper.
This hardcore option has existed in Minecraft's Java Edition for a long time, but in Bedrock you either needed to manually delete and generate a new world each time you died, or bodge it with an unsatisfactory paid mod from Bedrock's marketplace.
Bundles Of Bravery adds a simple toggle you can add when generating your world, which seems to exist independently from other difficulty settings.