What would a better Unix shell look like?

A better shell might have some or all of the following properties:

• Opens a new pty for each command and allows you to either include the whole command output or a scrollable window on it in the overall scroll. Clearing the screen should, by default, fullscreen the command output.
• Displays which commands failed and which relied on now-changed inputs. (This requires tracking the inputs of every command.)
• Optionally re-executes selected commands periodically
• Displays per-command resource usage, such as CPU time and RAM usage. By default runs commands with limits to prevent horking the whole machine.
• Provides notifications of finished, idle, and newly non-idle commands in a way that doesn’t interfere with foreground tasks. This requires at least some minimum UI for configuring it.
• Copes with voluminous command output gracefully, at least up to gigabytes. Should have options to FIFO-discard, block (like ^S), and increase the scrollback-retention limit.
• Supports distributed operation, including running commands on remote hosts, inside of Docker containers, and across multiple remote hosts, as well as session recovery from network disconnection and even machine restart.
• Options for fancifying command output; for example, hyperlinking ls and ps output, or colorizing and relayouting other commands’ output.
• Programmable autocomplete, of course.