>I did the sums, the Intel P4 3.4Ghz came out 2004, if Moore's law continued, we would have 3482Ghz or 3.48 TERAHERTZ by now.

Comparing raw CPU speed seems like a bad metric. A new i5 clocked at 3.1Ghz will absolutely wipe the floor with a 3.4Ghz Pentium, even for single threaded workloads

https://cpu.userbenchmark.com/Compare/Intel-Pentium-4-340GHz...