One way to look at this is in megabytes... the Tyros has something like 96 MB of sound samples, which is the most of any Yamaha instrument currently. That's a lot for a keyboard instrument under $3,000, but it's not much in computer terms - less than a Zip disk of data in fact. My laptop computer has 512MB of RAM on two chips barely bigger than my thumbnail. So we haven't come close to any technology limits as to where we can go in terms of quality of sound. The current balance seems to be how much development has to go into the mass production of an instrument and it's sound samples versus how much consumers are willing to pay. The Synclavier synthesizers of the 80's used by people like Michael Jackson, Stevie Wonder and Sting were far more powerful and realistic sounding than almost anything on the consumer synth market today, but they cost 100's of thousands of dollars. Interestingly, used complete Synclavier systems now sell on eBay for around $8,000 - a bargain but still a heck of a lot more than what a Tyros costs.