And I think this is the target demographic of the iPad - either creative types (eg. designers or musicians) or executives (eg. Consultants, PMs, etc) who are not code driven but still need a workbook style environment. From a security standpoint it is best for these users to be locked down (Least Privilege is a good security model to follow for non-technical users).
P.S. I do have my own ancient Macbook that I installed Ubuntu on for my own light hacking, but most of my personal tinkering dev is now on Cloud GPU instances so all I need is a dumb terminal for SSH.