The IoT revolution is inherently price conscious. It's not that any of this stuff is new, it's that I can buy a device cheap enough to consider adding wifi to everything, including a temperature sensor on my toaster, to show me temperature graphs for the perfect toast.

It could be done 10 years ago, but spending $200 to internet-enable my toaster is ridiculous, but for $25 ($20 + a temperature sensor), it's a fun and silly weekend project.

Spark themselves make the Core, which is $40, which is the same ecosystem, and also wifi shields for Arduino have existed for a while, though they aren't as cheap, and on the larger side, Raspberry Pi's have USB, which means you can just plug in a USB dongle.

So I say yes, for $20 to go from wifi -> breadboard, this is revolutionary.