Maybe I'm mistaken...but isn't that what Apple did? But they made a waaaay bigger deal out of it.
No. Apple didn't give a 4-6 month lead on what they will be releasing concerning the iPad. The iPad was announced on January 27, 2010, by Steve Jobs at an Apple press conference at the Yerba Buena Center for the Arts in San Francisco.
The iPad was released April 3, 2010.
That's a whopping 5 weeks.
More to the point, Apple announced a new market and within 5 weeks it was fulfilling that market.
HP is announcing an entry into this market 4-6 months ahead of time.
Meanwhile, iPad 2 will be out globally in dozens of countries and we'll all be discussing OS X 10.7 and the next iOS version.