They probably won't ship until the end of this year.
HP & Microsoft announced the Windows Slate tablet back in 2010 & it never made it to market.
http://gizmodo.com/5442200/hps-windows-7-slate-device-reveal...
http://www.asymco.com/2012/03/02/when-will-the-tablet-market...
In a BYOD world, can enterprise sales provide enough traction for Microsoft to overcome their lack of appeal in the consumer market?
EDIT-
It appears the low end model will be out in October in time for the holiday season, and the Pro version 90 days later.
I don't blame them for trying to vertically integrate, especially after seeing what it has done for Apple. But I think they're too late to the party.
Given how a lot of OEMs are pumping Androids, Microsoft may just have to start hedging its bets.
(On a lighter note maybe we can start a red-ring of death meme).
I think based on the dreck that the OEMs have been delivering for the last 8-10 years, it's not surprising that Microsoft felt it had to jump into the hardware business directly.
Poor PR from MSFT.
[http://en.wikipedia.org/wiki/History_of_the_iPhone#U.S._rele...]
Seriously, no release date, no pricing, no real demo (rendered images instead), no software announcements other than Netflix and Office. This type of product announcement might have worked pre-Internet, but nowadays people expect to be able to find out concrete details and pricing once a product is announced.
No demo units shipped to Walt Mossberg or David Pogue, or even a John Dvorak...
This isn't like the Zune however. The Zune was peripheral to Microsoft's core business. This is central to where a large portion of the computing market is headed. If this takes two or three revisions to gain traction, then Microsoft might be too late.