are you kidding? Mobile has just started. How can you say that the price a mobi domain would go down? The market has just started. The future is not going to be sitting at home accessing the pc, we are on the go. Do you think the Iphone is old hat? The mobile market (info on the go) has the best chance of suceeding.
.mobi will be bigger than .net, .org, .us and any other sub par ext.