Hotels may have WiFi, but when you travel, you don't stay in a hotel all day. You're on the road, about the city you're in, etc. Getting email and such is dependent on your internet connection.
I'm not defending AT&T's "right" to do this. I'm saying it actually halfway makes sense. Actually, I said in my first post that I was iffy about them forcing it, but no one seemed to read that one. A lot of people buy these PDAs without data packages and come back a month later complaining about all the data charges on their bill because they were using features that required data transfer...there won't be anymore of that, you'll know exactly what you are getting and exactly how much it will cost.
I mentioned the other carriers because Matt was talking about switching, so that was relevant.
As for phones like the Eternity, last I checked, those plans were still 15 bucks for unlimited data, regardless of how they classified them. PDAs have a data plan of $30, and non PDAs have a data plan of $15.
On a side note, if you go to AT&T's website, sorting phones by PDAs/Smartphones only yields PDAs, so I'm not quite sure why all those reps are telling you the Eternity is a "smartphone". Generally speaking, "smartphone" is a term coined for PDAs.
Sure, people are going to be unhappy about this, apparently. But the people who still need PDAs will get them, and the people who don't will start getting regular phones. When a mother comes in and buys her 10 year old son a Blackberry, there's something wrong. I'm all for PDAs being used for what they were meant to be used for, which is what this data plan implementation will do: make it so only people who absolutely need these phones buy them.
If you still really want a PDA and no data plan, you can get an unlocked one and you won't be affected. Or even a non unlocked one, so long as you just put your simcard in it.