Hopefully this perspective is useful...
Honestly, I wouldn't find that terribly appealing. But then, desktop publishing has come a long way over the last five years, and I'm relatively skilled enough with Word (or Open Office or a variety of other tools) that I could do that myself. Not to mention, from POV, I'm not paying for a skill I don't possess at that point, I'm paying for a convenience that frankly isn't all the convenient compared to Word/Open Office, a few graphics and Cute PDF.
Now, cool maps/tiles are another thing entirely. Not simply just blah ones, but a level of "cool" - whether its different, appealing, artisticly amazing, whatever. There are a lot of "just okay" products available in this space these days already, and we're getting to a saturation point (or at least, I am). You either have to be preprinted/prefabbed like WotC tiles - which combine cool AND convenient - or execute the digital product concept really well.
Even with applications like Dundjinni and Campaign Cartographer, I'm not such a great hand at maps and battlemaps and such. Probably a total lack of artistic ability on my part. But THATS what I'll pay for - the artistic ability I don't have but like to have access to - and I can (and do) spend lots on it. Wow me with cool, usable maps or terrain or whatnot, and I'm a customer. Put out something I could do myself, or something that is ho-hum and I look elsewhere.