Improvements in single-core performance (the kind that matters for Javascript and most real-world applications) has been near-stagnant for many years now.
Your projection also implies that programmers of the future won't also produce exponentially slower code. I have doubts about that, considering how unresponsive programs these days are, compared to their counterparts of two decades ago (when most programmers actually cared about performance).
Your projection also implies that programmers of the future won't also produce exponentially slower code. I have doubts about that, considering how unresponsive programs these days are, compared to their counterparts of two decades ago (when most programmers actually cared about performance).