Netflix on Comcast's X1 service. Image source: Comcast.The percentage of households with at least one of the big three streaming services -- Netflix (NASDAQ: NFLX), Amazon (NASDAQ: AMZN) Prime Video, or Hulu -- is about the same as last year, according to a recent survey from UBS.Netflix, specifically, saw its penetration remain stagnant at 42%, while Amazon Prime Video saw the largest improvement, increasing penetration 4 percentage points from 23% to 27%.