I disagree. Your wireless network is typically most limited by its connection to the outside world (the WAN connection to the Internet). If, for example, your home Internet connection supports a maximum 5 Mbps, you buy a new MacBook Air that supports 802.11ac, and you want to surf the Internet from your MacBook Air within a couple meters of your wireless base station -- in other words, if you're like most people with wifi -- then there is probably zero benefit to upgrading your base station to 802.11ac from 802.11g or 802.11n. Your wireless network will simply wait faster for the same Web pages retrieved from the Internet at the same speed. Increasing the capacity of a network element that isn't the rating limiting factor yields nothing, and it's not common that your wireless network is the rate limiting factor.Do you have any devices that support 102.11ac ??If so then yes, without a doubt!
"Not common" is not the same as "never." However, I'm sure Apple is counting on many ignorant people to buy new base stations...to attach to their much slower Internet connections. Unless they're pushing lots of data through on the wireless side (Mac to PC, for example), or unless they can benefit from improvements (if any) in 802.11ac range, a base station upgrade is a waste of money.