I lived in Northern Virginia for 8 years.
It's got a mediocre quality of life compared to other tech centers, extremely high cost of living, horrific traffic, and has a talent pool that is inflated on paper due to the misaligned incentives of the Federal government workforce (Federal government workers are promoted and hired based on arbitrary checkmarks like Masters degree: yes/no, etc) which cause people to pursue worthless graduate degrees for pay bumps. This is why there are so many diploma mill type schools with campuses there. Add in the incredible over-staffing of Federal projects (both gov't and contractor) and you get incredibly mediocre talent where a "full stack web developer" produces very little over 3 years and has an atrophied skill set. Forced me to hire based on side projects and active Github projects to weed out the huge amount of mediocrity.
Bezos has political aspirations, and honestly, this makes sense from the perspective of already having massive data center presence there. He will now have large numbers of employees added to both Maryland and Virginia, giving him much more influence with Congress since congressman in general kiss the ass of large employers in their districts.
Hopefully, he could have some positive influences on the Federal gov't, by having a contracting wing from Amazon that would help fix the awful, bloated, IBM-like state of the Federal agencies. They used to do great things, but like IBM, they have calcified into jobs programs with dead-sea effect staffing.