This is true, but doesn't really capture the types of experiments that are being done in many cases. Yes, your genome can be stored on a CD. However, next gen sequencing is usually done with a high degree of overlapping coverage, to catch any mistakes in the sequencing, which is still basically a biochemical process despite geting large text files as the end result. So any genome is sequenced multiple times: say 8x coverage as fairly standard. That is if you are interested in sequencing a single genome.
If you are interested in sequencing all the mRNAs that tell you which genes are active in which tissue and cell type, expect that you need to do a similar amount of sequencing for each tissue and cell type in the human body. Now imagine doing that with different experimental conditions: disease states, environmental factors etc. Of course, on top of that, you will need replicates of each experimental condition in order to have statistical power to say anything meaningful. On top of that there is the sequencing that you can do to identify differences in the epigenome: how the DNA is marked with things like methyl-groups, how it is wrapped around histones, all of which we are finding has a huge functional difference.
Having the a genome sequence is a lot like having the total word list of the english language. It is huge and powerful, but there is a lot more information you need before you can write Shakespeare.
