SUI misconceptions

These statements are not necessarily true:

• It is always easy and natural to use SUIs. After all, almost everyone can talk!
• Talking to a computer is just like talking to a person.
• Usable speech applications require the latest and greatest technologies.
• Barge-in is essential. Without barge-in, a SUI is unusable.
• Users hate beeps and other tones in SUIs because they aren't natural.