Your analogy machine is broken
The analogy is NOT to an outside privvy and a tin bath in the yard.
The analogy is between a modern American Standard toilet and the original flush toilets built by John Crapper in the 1800's. Crapper's toilets had an elevated water reservoir and flushing was done by pulling a chain, but otherwise they worked EXACTLY the same as a modern toilet. They had the same exact kind of seat as well. They even SOUNDED the same.
Once society perfected the toilet, that's how toilets were made from that point onward. The toilet problem was solved, and society moved on to solve new problems.
Note that indoor baths haven't changed much over the centuries either. They're still usually made of porcelain covered steel, they still usually have the same shape and they still have faucets that supply hot and cold water.
Interesting note: The best, most expensive bathtubs are designed to look EXACTLY like the claw-footed soaking tubs of the late 1800's.
But congratulations for missing my point entirely. Let me restate it.
If you want to access the web, do programming, or word processing, or any of the other things we generally do with a computer, the cheapest netbook available will do these things BETTER and MORE CONVENIENTLY than your silly iPad. The WIMP interface is superior to Apple's silly finger movements; it's more precise and effective by far. Good luck doing something as simple as typing an email! Or chatting in IRC (Oh, wait, the iPad doesn't DO that, does it?). Your graphical keyboard doesn't offer ANY tactile stimulation to help you type. You'll be lucky to do 5 words a minute. I can do 80 wpm on my Netbook. I can type faster than I can TALK.
And it's highly disingenious for you to formulate such a long list of devices. The iPad cannot perform the tasks of even half of your list. It's not magic, man. It's just a silly little tablet PC.
Oh, and using a single-tasking operating system? In 2010? Party like it's 1989! No flash support, no Java support... Seriously, what GOOD is it? It's just a toy for people who don't know what to spend their money on.
Do as you wish, but admitting to yourself that it's a trinket is the first step to achieving enlightenment. Say it with me: "It's just a toy... You bought it because it was Teh Shiny."
Admit it! You'll feel better!