Predicting that IC density and complexity will continue to increase is kind of like predicting that the sun will come up in the morning-you'd literally have to be living under a rock to not be aware of this. And so it is with FPGAs, which are getting more, not less, complex; whose pin counts are going up, not down; and for which the available silicon seems to grow faster than many engineers can figure out how to use it. The only thing that steadfastly refuses to change is design schedules, which bewilderingly remain as constant as the sun.
Integrating these ever-more complicated devices into their host PCBs has proven to be extraordinarily challenging. FPGA designers, schematic engineers, and PCB designers find themselves locked in a divergent battle, struggling to create device pin assignments that satisfy both the FPGA and the PCB. Traditional tools almost encourage each specialist to "throw the design over the wall." As the design progresses, this tool-mandated "not my job" mentality dooms the team to wasting precious time, often late in the project, iterating between the FPGA and PCB design, searching in vain for common ground in pin assignments.
Regrettably, it's the PCB that usually suffers, with more layers and vias being added to accommodate the FPGA. To make matters worse, this typically manual round-trip process introduces errors that may not be exposed until the first prototype is powered up in the lab.