As another posted said, the scientific calculator is dying, if not already dead, IMHO. Its primary use in my observation, is education. VPAM, graphing etc., are mostly for novice users, which is currently the target market for calculators.
The key issue is after you make a calculation, what do you do with the result? Integrate it into another program for further processing? Enter the result in field, in a computer? So, for the most part, calculators today for professional use are mostly for back of envelope brainstorms, and quick approximations, rather than for precision work.
Even in the simplest use, debt or mortgage calculations, actual results by banks use very high precision numbers, 2-30x more than a general scientific calculator. However when sitting down with the bank agent, they are opt to use a calculator to give the customer a ballpark figure. Often a feature of a specific 'financial calculator' is they do have higher precision numbers compared to a general scientific or programmable one [ 16-32 bit numbers in financial, versus 10 or 11 digits in the Casio FX260] or present the amortization table on a PC their working with, again making the calculator superfluous.
So, in the end, the modern scientific calculator is more like the slide rule was before 1980, to make estimates, but instead of breaking out the log or trig tables and extending the precision, we punt it to computers instead.
RealCalc puts a scientific calculator on my Android phone, and I use it about as much as my FX260, but the cramped screen makes it less attractive to reach for. Its main appeal is it works very much like the FX260.