MacRumors reported a while back on the alleged second update to the Thunderbolt standard since introduction. This news is the reason that even if fancy new Macs I otherwise want come out later this year, I won't get them if they don't have the new "Thunderbolt 3".
The computers I use have Thunderbolt 1, and accessories that use Thunderbolt 2 are only just becoming available. It's also a new form factor connector:
The site says Intel's new Thunderbolt controller, code-named Alpine Ridge, will see power consumption reduced by 50 percent, support for PCIe generation-3, and charging capacities of up to 100 watts. Backward compatibility will be maintained through the use of connector adapters, but the new Thunderbolt connector itself will be reduced in size.
Thankfully, I'm in no danger of needing new computers any time soon. I would be tempted by an amazing new take on the MacBook Air. I've wanted one of the new Mac Pros since they dropped last year. I did buy a new i7 Mac mini back in March for ESN, and only because I couldn't wait.
I hope they don't announce something amazing that has "plain-old" Thunderbolt 2. Then again, the move to an even slimmer MacBook Air would require a move to slimmer Thunderbolt and USB (if there is USB at all) ports, as they're the thickness limiting factors now.