Within minutes of Steve Jobs’ announcement of the new iMac, the streets of SF were displaying this ad.

We’ve heard lots of speculation as to why there wasn’t “just one more thing” at the end of Steve Jobs’ keynote address. And we’ve wondered why there hasn’t been more promotion of AppleScript Studio, QuickTime 5, Java development, the new iBook, and a host of other Apple projects.

But this is Macworld, a consumer show. And times are tough economically with people choosing their purchases very carefully. What Apple wants to do this quarter is sell computers.They’ve introduced a beauty, and they’re not going to dilute their message to this key audience.

As you look around San Francisco, the Moscone Center, and the Apple booth, you see one thing — the new iMac. The high end model begins shipping later this month for $1,799 US. It’s a lot easier to make your nut selling $1,800 widgets than $400 ones.

Maybe Jobs should have closed the keynote with this … “Oh, and just one more thing … We’re not stupid. We know it’s hard to sell computers now, and we’re focusing our energy at this show to do so. Please buy one so we can talk about other things too.”

You tell me … single-minded or simple minded?