The Surface 2 and Surface Pro 2 are currently available for pre-order, but shipping dates for those ordering now may disappoint: Some versions won't ship until way into the future, as far out as December.
The Surface 2 (which runs Windows RT) runs 449 for the 32GB version and $549 for the 64GB. The Surface Pro 2 (which runs full Windows 8) ranges in price from $899 to $1,799 and comes in 64GB to 512GB versions.
The deadmau5 concert was a surprise, and the artist tweeted about it later:
THANK YOU! @microsoftcanada for another epic show:) #Surfacehaslanded and thanks to everyone who came out! [...]Microsoft's second generation Surface tablets have been upgraded in many ways, including a redesigned kickstand, and upgraded processors and other hardware -- including, in the case of the Pro version, an Intel Haswell CPU that promises to give increased battery life.
was a real treat to help launch the new Surface in Canada tonight with @microsoftcanada #surfacehaslanded with some new music n stuff!
This isn't the first Microsoft event for deadmau, as a quick Google search reveals. He's also performed for other companies, including Nokia.