There is not much 4k Content yet (and bandwidths squeeze them) for example a true 4k is like below
pixels | 89,70,240 |
frames | 30 |
MBPS speed Required | 269 |
Netflix recommends | 25 mbps |
| |
Which means that Netflix itself is possibly using a lot of compression to transmit real 4k. (so is that really 4k?) so all said, i think we should be good with 2K displays for internet usage till internet becomes faster and cheaper.