Interacting with machines will make increasing use of our natural faculties. I think the way we interact with machines is dependent on the task. For example, it may be easier to type in a sum on a calculator than to dictate it, or to point to a location on a map rather than enter coordinates.
I think we will see increasing use of virtual assistants as a general interface and when dealing with more complex or unclear situations requiring dialogue and feedback.
We will see computers able to have reasonably natural chat and conversations in certain domains. I do think voices will include a degree of emotional tone, etc. in the response. However, these conversational agents will mainly use large statistical models based on conversational data rather than the machine having grounded understanding, so it will still be more pattern matching rather than understanding. Some generalizations across different topics may be possible with the machine recognizing larger patterns
In terms of machines having the proper grounded understanding, or context, in which the machine has experience of the world that it can relate to directly or build metaphors from, in three to five years we will see progress in this area, but still at a basic level.