That could end up being Electron (VS Code), though that would be a bit sad.
Of course, that would be suicide for the industry. But I'm not sure investors see that.
I'd bet on maybe ad hoc ai designed ui-s you click but have a voice search when you are confused about something.
Today a website is easier. But just like there's a very large percentage of people doing a great many things from their phone instead of tying themselves to a full-blown personal computer, there will be an increasing number of people who send their agents off to get things done. In that scenario, the user interface is further up the stack than a browser, if there's a browser as typically understood in the stack at all.
I don't think I ever used a human for that. They are usually very uninformed about everything that's not their standard operational procedure or some current promotional materials.
Not to mention that the "human input" can be pre-scripted to urge you to purchase more, so it's not genuinely a human interaction, it's only a human delivering some bullshit "value add" marketing verbiage.