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I assume rather than the serial interface code, there would need to be a comparable wifi interface code on the Arduino side.

so Arduino released a new version of the Uno using a 8 bit micro-controller, when the market options are 32 bits ARMs micro-controllers, with FPU, faster clocks and more memory for programs and files.

also more expensive compared to this one: https://www.adafruit.com/product/4000

The wifi chip is the same (ESP32) , but the Arduino board version does not have the ESP32 flash memory, another disappointment.

Arduino Uno 2: Metro M4 Uno Base:

Although the Arduino has 2 new devices: Secure Element, and IMU but still 16 MHZ and 6K RAM!!!

I'm curious mstephens_42 why you picked this Arduino Uno v2 ? Do you have plans to create a new firmware code to support this Uno v2 and/or combine the sensors ?

PTP, I just bought a couple of these to work with my daughter on an electronics class in engineering.  She has to use an UNO for her project and  also wants to tweet the sensor data.   Rather than add a shield, I just bought the all in one.   Later I may repurpose for robotics.