Even being an anti-apple person, I'm not sure I would give the advantage to HP for the 1.6Ghz Atom over the 1Ghz A4 without some real benchmarks. Also, how lightweight (or not) the OS is will probably determine more than their relative speeds.
You can already buy a normal windows tablet today... it doesn't make sense why manufacturers would try to "re-release" products they already have. You can probably buy a fast dual core tablet PC today that would blow the socks off the 1.6Ghz Atom.
