I do agree with you when it comes to mobile phones as the screen is well to small for desktop focussed/optimised Oracle forms application. BUT for iPad tablet and co it does make sense to being able to access forms applications - e.g. for quick enquiries & simple data entry. Especially if it is not used heavily and it is not worth the development effort to implement a mobile solution accessing Oracle forms on Tablets is a good thing.
Carlos, you may want to have a look at this youtube video showing how you can run Oracle Forms on the iPad with the ThinForms client: http://www.talkingbyte.com/?p=2&product=ThinFormsVideo