One
thing that is interesting, if I use KDE's system settings to
add a
printer, and I select the Epson ET3700 Series network
printer entry
which uses IPP Anywhere, when I'm prompted for the driver I
get offered
two Epson categories (Epson and EPSON), the second category
has the
driverless driver and the first category has all the cups
supplied
drivers, of which there isn't one for the printer I have.
I've had the
printer for several years, but I guess it is still too new
for cups to
support.
OpenPrinting CUPS
The current standards-based, open source printing system
developed by OpenPrinting for Linux® and other Unix®-like
operating systems. CUPS uses IPP Everywhere™ to support
printing to local and network printers.
I doubt anyone will be working on legacy CUPS drivers for
printers that support IPP/AirPrint/<other verndors' IPP
implemenations>.