I think it is not right to map ncsa mosaic to the iPhone. Mosaic will more correctly map to the earlier smart phones like the Treos, window CE and symbians, which were in existence in 2003
IMHO Mosaic maps perfectly to the iPhone 1, with Netscape mapping to the iPhone 2 etc. Like the original iPhone, Mosaic was the first browser that really thought carefully about what the customer needed, and then got mass adoption as a result. WWW, Lynx, Viola, and Midas map to the early phones like Treo, WinCE, Symbian, Palm Pilot, etc.
Regardless of the precise comparisons there is still a long long way to go.