The statewide races were not landslides by any means. The legislative losses were almost exclusively in NOVA, so I would presume some Clinton-Suburban Republicans might consider that when determining whether to run for reelection. While tonight was not good, it isn't time to sound the alarm that 2018 is going to be wave. If Trump cuts taxes, suburbanites will come home.
GOP tax plans hit suburban voters (especially upper-class suburbans) hard and could decrease their property value.
If R's think this is a way to win them over then they might as well give the gavel to Pelosi today.