All new technologies havetheir proper place. All new technologies will take a while for usto figure out the best mannerof interaction as well as thestandardization that removesone source of potential confusion. None of these systems isinherently more natural thanthe others. The mouse and keyboard are not natural. Speechutterances will have to belearned and gestures carefullydeveloped and standardizedthrough time. The standardsdon’t have to be the best of allpossibilities. The keyboard hasstandardized upon variations ofqwerty and azerty throughoutthe world even though neitheris optimal—standards are moreimportant than optimization.Are natural user interfacesnatural? No. But they will beuseful.