Disagree. They wouldn't show young children using computers if they thought their target audience was too stupid. The whole point is that a 4 yr old can use a computer because they're easy to use (and they are).
The amount of people unable to use a computer shrinks massively every day. If you can't use a computer, then the likelihood is you're over 60 and don't want one - anyone who wants to do something enough and is prepared to give it a go will get it.
If you're under that age, then you either can't afford one (less developed country) or will avoid using one in your job and life because you don't like them.
It would be stupid for Apple to market to any of these groups since they are steadily decreasing (particularly the older people group), and unwilling to conform anyway.
If the tablet is made simple, it will be to keep costs down, to market it as 'Apple's simplicity that just works' or to give lots of potential for expensive add-ons, upgrades and alternative versions.
I don't think you got the point of my post. It is not that "they thought their target audience was too stupid". Rather, their target audience has better things to do with their time (and money) than to invest in complex technology with an unproductive UI.
The OS needs to get out of the way, so the user can do his thing.
BTW, I am over 70. I owned some Apple Computer stores when the Mac (and that ad) were announced! Most of the computers of that era had CLIs (Command Line Interfaces) to primitive DOSes (Disk Operating Systems) as the standard UI.
What the Mac UI did was allow the user to get to his stuff, without remembering, and typing, a lot of cryptic commands.
Now, variations of the Mac-style UI (with kb & mouse) have become the "standard". Users migrated, en masse, to that "standard" UI because they were more productive... to stay mired in the UI of the past could be considered to be... er, well, stupid.
I have 7 Macs, all the Pro apps, including FCS, Photoshop, Canvas... about $10,000 in pro apps and plugins. When I use these I want a full-figured OS like OS X.
But most of the things I do are: surf the net, email, iLife, graze content, etc. These things can be done as well (or better) with the iPhone UI (Spaces on the Mac). Don't need all those windows (and all the OS X capabilities) for most of what I do.
Now, most computer users don't have (or need) $10,000 worth of Pro apps.
I believe that:
-- Apple's Tablet will have an iPhone-like OS (in that it is mainly invisible).
-- MultiTouch input with optional stylus
-- Hand printing, hand writing and shape recognition
-- Multiple Tasking (ala Palm Pre, or Mac OS Switcher), with a CoverFlow task navigation
-- iLife and iWork apps redesigned for iPhone OS and touch
-- Can be used as a peripheral display/touch input to another computer
-- Can use another computer (AppleTV, iPhone, etc.) as a peripheral to the Tablet (kb, scanner, midi, display, etc)
So, this device will do what I need to do 90% of the time. For the other 10% I will use a Mac with Mac OS and Pro apps... But I will use the tablet as an i/O peripheral to complement apps on the Mac [rewritten to recognize and exploit the MultiTouch Tablet].
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