Earlier quoted context omitted.
Definitely for worse in many cases. Every time I buy a new phone with better specs, I expect that things will be that much better, but they never are. Instead, the power is wasted on useless things like animation, apps that I can't shut off running in the background, etc.
People often claim this, but I've never really found it to be the case. Faster processors and more memory let me run the same software much faster, or better software the same speed as the old, in general. So, perhaps you are seeing the second factor happening more, but don't want or need the improvements?
I don't have this problem on my workstations (generally) except when I browse the web, though recently I've had to make the practical tradeoff of owning a smartphone, where this problem is rampant.
Worse than things not getting faster, the same product tends to get slower because the software designed for the new hardware is the only maintained branch, and the versions for older hardware are just backports from future hardware.