The New York Post quotes analyst Ezra Gottheil:

If you want to get a device out—if you’re [a manufacturer]—do you have to go with what’s available right now or do you wait for the next generation to come out?

If you’re Apple and what’s available’s not good enough, you wait. If you’re pretty much everyone else, you don’t, and you risk releasing sub-optimal hardware, like the Galaxy Tab. Oddly, most of the market still doesn’t get this.