Ideas are cheap and worthless - it's the execution that matters. That execution in the context of a patent is a viable product or use.

MOSFETs were NOT viable until the 1960s. RCA made the first practical metal-gate CMOS that is known as the "4000 series" of logic parts. And even then, that technology didn't take off until all the other problems of mobile ions, threshold tuning, etc. were finally solved to give us CMOS as we know it today.

There are always wankers who point to this patent, but it really doesn't matter because it took another 50 years to achieve anything that mattered.