I see the point. If you just want to, you know, calculate equation, and that's what you use calculators for, then I can see that RPN is a better input method. But you are out of touch if you think you can actually compare calculators on the basis of input method at all.
If you enter certain academic programs, you will need advanced calculator functions. When I transitioned from a Physics undergrad (where I never even owned a calculator) to an engineering discipline, I found out that there are pockets of academia where misguided (incidentally Korean) professors assume that every student knows a TI-89 inside and out. I didn't even own one. When I went out and bought one, I had to read the manual to figure out how to get to the home screen.
In Physics, if I needed the value of a transcendent function or something, I could raise my hand and ask the professor, and the professor would apologize for putting something like that on a test and would write it on the blackboard for the other students.
In grad school, it was more like "um, Mr. Professor, how am I supposed to numerically integrate the Gibbs Free Energy equation for all the systems in this giant table so that I can do the second part of the test?" and it was met with silence and an expression of disgust.
But the calculators are pretty neat anyway. In real life, I'm usually close enough to a computer to just fire up perl.
