The slider is a render option for number fields:

I believe autocomplete is how reference fields render by default. 

The switch component is how you would render a toggle type table filter.

Toast is a mystery to me. 

Toast is available via the new “Show Message” action in the Action Framework, which shows a “Toast” message.

Autocomplete is used as Kaede said in Reference fields, as well as in Filters and some other locations. 

Switch is a new renderer option for Checkbox / Boolean fields, like Slider is for number fields. Slider is also used in Numeric Range filters.

Thanks Kaede and Zach!