I thought the same thing when I bought my first Texas Instrument hand calculator.
Then I said the same thing when I purchased my state of the art MotoRazr flip phone.
When you ask how much better can they get ... there is really no end to it. There are temporary limits, for the time being, having to do with limits in imagination and the capabilities of technology at the present time ... BUT ... as time goes on, those limits keep being extended. I don’t think there are any limits in the long run!