This line of thought happens in all sports.
AFL: "How good would Ablett have been in the era of flooding"
Tennis: "How good would Federer and Sampras have been with wooden racquets"
People love to compare the greats, and also people love to say that the current greats aren't that good. People say we elevate our contemporaries too high, but an equal amount of tearing our contemporaries down because of some nostalgia happens as well.
Sehwag, Kallis and Ponting cop this a lot I reckon.