In reality 802.11ac is usually much slower than 150 to 450Mbits but since the middle of last year 802.11ac routers started to show up all around the world. This new standard can get you to 866Mbits and even higher, but Intel has been rather slow to adopt it.
Intel has promised that both Shark Bay notebook and desktop platforms for 2013 will get support for 802.11ac. The card is based on a 2x2 dual band configuration and will support speeds up to 867Mbits per second, in addition, it will support wireless 1080p display, Intel smart connect, Intel Vpro (only with Y and U processors for notebooks) and Bluetooth.
This is the first product based on 802.11ac but we believe that with time Intel will add more choices to its wireless portfolio as 3x3 802.11ac configuration should potentially run even faster. It will be interesting to test this new card in the real world and see if 802.11ac wireless can get you any faster than 802.11n in real life applications.