A web page in 2030 will weigh almost 320 Mb. The average mobile bandwidth globally will be 93 Mbps.
Of course, this is not very likely to be true (well, who knows really…). Just for fun, I calculated the growth rate of an average web site from HTTP Archive (May 2012 to May 2013) and Ciscos projected growth rate of mobile bandwidth globally until 2017.
Then we get this hockey stick: #justsaying
How bandwidth and page weight will grow until 2030 with the current (2012-2013) growth rate. #funstats