[valarauca1]

Not really.

The fundamental limit of clock speed is power draw. As clocks increase the wattage ~ frequency relation goes from

     frequency = Constant * Power Draw

It starts becoming

     frequency = Power Draw * Power Draw

As you start getting >3GHz so while we can make processors that run >5GHz. There just aren't applications that benefit a lot from it.

[Armisael16]

I think you have that backwards, unless you mean to say the the power draw is proportionate to the square root of frequency at higher clocks.

[ip26]

Well, you can fight the power monster with dark silicon.

Packing things in more tightly lets you spend less time in transit, which might let you squeeze more gates into a cycle, or do the same things a little faster.