Three Ages of FPGAs: A Retrospective on the First 30 Years of FPGA Technology (ieeexplore.ieee.org)

There's a talk on this given by Steve Trimberger to some lucky UofT students on youtube: https://www.youtube.com/watch?v=4ntXSyOhlBY&t=2s

He's an engaging speaker and is speaking from first hand experience as one of the first employees of Xilinx.