Apple has a bunch of core applications: OS, browser, email, programming system, tunes, movie, presentation, image cataloging, etc. They need to round these core applications out with other key applications like:
word processing - beyond TextEdit
spreadsheet - Keep It Simple - no bloatware
image processing - buy GraphicConverter and build on it
drawing - vector & bitmap (take on Photoshop and Illustrator)
layout - replace Quark which is a pain
database - simple and with basic progammability (Cocoa, REALbasic?)
flight simulator - a key application on any computer!
X-Plane/A10
What else are core applications Apple should bring out?
Each of these need to be able to share files with the existing programs like Photoshop, Illustrator, Word, Excel, Quark, etc. Preferably they would move toward open file formats. But I must be able to read in all my existing Word and Excel documents if I'm going to make the switch. I've got 20 years of old documents that I still use and I can't just scrap them. Change of application would be fine, but the data is the important thing.
Like with iMovie/FinalCutPro there should be a free or low cost (iLife) version and a pro version of each. Many users just need a very simple spreadsheet to keep tables of data and do sums, etc. A much smaller number need powerful spreadsheet programs and even fewer need powerful presentation features on the spreadsheet. Same for wordprocessing, layout, drawing, etc. It's a waste to try to sell a $500 program to a user who needs a small subset of the features. They might be willing to pay $20 or $50 or get it as part of a $100 package of applications (e.g., iLife) or part of the annual subscription to the OS.
Serial numbers are fine (e.g., iWork) but they shouldn't implement spyware like Microsoft did in Word. I stopped upgrading Word and Excel. I don't cotton to the vendor accessing my machine, the software calling home, etc. ET can get his own machine.
Third party offers just aren't good enough and tend to get bought out by PC vendors or even Microsux itself. There used to be quite a few players in the spreadsheet and wordprocessor market but the big players squashed them. Open Office doesn't cut it - maybe someday. It might be a starting point for Apple like with Safari. It would be nice if Apple supported 3rd party developers even more but the fact is their market share is small enough that it is all to tempting for developer's to switch, the wrong way. Apple has to counter this with better developer support and with bringing out certain core applications themselves.