the new Arduino IoT Cloud platform with MKR IoT Bundle via public internet?

this new IoT Cloud platform looks amazing

with this IoT kit :

is this designed to work only with local WiFi or will there also be a way to let it communicate via 2G/3G/4G (GPRS, UMTS, LTE) and a SIM card with the public internet?
e.g., I came to this idea by this device: Arduino GSM Shield 2 (Integrated Antenna)

or will be needed another MKR board apart from MKR1000?

Just saw that perhaps the MKR1400 is more suitable than MKR1000 to work with public internet Arduino MKR GSM 1400 .

Are there any example sketches available about projects connecting to GSM band internet?