Resolution is always determined by angular resolution at viewing distance, even for analog TVs(they were smaller and further away), and also,
Videos on Internet is always heavily compressed - the "resolution" is just the output size passed to the decoder and inverse of minimal pattern size recorded within, technically not related to data size. Raw video is h * v * bpp and have always been like low to dozen Gbps.
Just my bets, the bandiwth may peak or see a plateau, but resolution could continue to grow as needed for e.g. digital signage video walls that wraps around buildings.