another thing is the definition of mobile. some think og it as riding a car, buss or similar.

others see it more as a variant of "portable". as in something you carry in your pocket and pull out when sitting at a table or standing still.

under the first definition, anything that cant ve done with one hand will be troublesome, as any bump will have hands/arms moving in all kinds of directions.

under the second, using two hands is perfectly valid, as there will rarely be raandom bumps to deal with.

and i agree on the above idea of relative and absolute, as a relative interface would allow one handed operation.

for instance, my phones built in browser has a pointer now, but one that jumps to "hotspots" in proximity when a direction is quickly pushed.

this allows for easy operation with one hand, even tho there are still some niggles.

i know nokia tried something similar with the early browsers of the tablets. but the flaw there was that it started at the top of the page, not with what was on screen at that moment.