Although it may seem odd for someone to look up something like "TaxAdvice.mobi" I really think that keywords nowhere relevant to on the go info will still be used and searched.
If keywords are looked up on a pc, they will be looked up on a mobile device. The only thing stopping people are the way they input their searches on their mobile devices.
For instance, say you are driving with your wife to the bank. She mentions that tax season is coming about and you haven't organized your families finances yet. So you arrive at the bank and she needs to cash a check and some other stuff. She runs into the bank and she's going to be a while.
While you are sitting the car you pull out your phone and type in TaxAdvice.mobi. Better yet, you type in OrganizeYourFinances.mobi. You want this information now! You are bored waiting in the car and see no reason to wait till you go home to get this information.
The only plauseable arugment that one could make about typing in OrganizeYourFinances.mobi is that it's way too long. I agree, it's definitely a long name despite the extension. But, if someone wants to organize their finances. They are going to find a way to input that information. Somehow most people will want full qwerty keyboards for their phones, voice input will be used, holographic input, or whatever.
It does not matter at all what situation you are in or what you want to look up. I think of so many topics topics not related to mobile or on the go info while I'm driving or waiting around. Most of us are actually thinking of much more than scores, news, and weather when we are using our minds. If I could easily input whatever I'm thinking about into my phone and get results within seconds (I need results instantly) then I and many, many people would use the mobile web for non-mobile and mobile related topics.
God forbid you are diagnosed with Mesothelioma. The second you leave the doctors office you are definitely whipping out your mobile device and typing in Mesothelioma related topics. You want to find out much more info right away about what it is, and a Mesothelioma lawyer that can help you fight against a company you worked for that exposed you to asbestos.
Meanwhile the person that owns those mesothelioma domains is getting alot of $$$ because you're clicking on those links.
Keywords that are searched for on a pc will be searched for on a mobile device, possibly much more. I don't think a keyboard should limit what we search.