This is what worries me. They dont mention the iPad getting everything the 3Gs iPhone does. I could totally see Apple leaving wifi only iPad users hanging out to dry and forcing them to upgrade to a 3G version to get multi tasking and other 4.0 features.
Look at the differences carefully. Wifi version has the same specs as the 3g versions.
The 3g and 2g itouch is not getting multi touch because of the hard ware similarities. Basically saying hardware X will not get 4.0
Ipad wifi and Ipad 3g are the SAME HARDWARE. just one has an addition communcations module. SAME HARDWARE!! So if Ipad is getting 4.0 both version will get the same software.
Wifi isn't the issue.....its hardware.
Iphone2g: Will not get 4.0 (your contract on ATT is up)
Itouch1g: will not get 4.0
iphone3g: will not get multitask support (your contract on ATT is up)
Itouch 2nd will not get multitask support
Iphone3gs: will get full 4.0 support (256MB ram)(your contract is still intact)
Itouch 3rd: will get full 4.0 support (256MB ram)
Iphone3GSHD: will get 4.0 (duh)
Ipad wifi: will get full 4.0 support (1ghz + 256mb ram, why wouldn't it)
ipad 3g: (it's the SAME HARDWARE!!!) so yes it will get 4.0
It's a hardware variation that separates them. NOT WIFI.