Voice based apps

Yesterday, I was discussing with one of my closest amis, Prasath about voice based apps. This is the idea. Mobile devices are the next gen computing platforms. The big issue that I see is "people cant see" ie the screen size is small that people really dont like to use it like a computer. So herez the great idea - change all viewable apps to voice based apps. Change the interface from seeing to speaking. The reason that 3 billion humans carry a cell phone is to talk. so why not develop apps tat literally talk to you and interact with you ? One of the big problem in that is voice recognition sometimes is not very user friendly. Also very specifically we were thinking that sometimes voice interface might not be all that great. For eg, say you call to a voice based Google (Voogle) and search for something, it would be annoying if Voogle talks back all the top ten results. we wud feel more comfortable viewing the top ten results and choose wat to do. So we thot that probably voice shud blend with vision and create a new interface or something. so with that we kind of concluded and moved on. Later in the eve, I saw a blogpost at Google about "Google Tech roundtable". Looked interesting and so listened to this talk on Human Language tech and people talked more or less about this idea that i mentioned above. Interesting huh ? There are quite a few challenges to it and would be a gud area to do a research i guess.