Cellular was always a premium feature... the real benefits you get from cellular models: GPS, Reliable Notifications (they will always come in over cellular so even if your wifi ends up having no connectivity for whatever reason - typical for hotels/restaurants) and a backup modem so you don't have to rely on your phone. That said, the amount of frequency bands supported by the iPhone/iPad is vastly superior to most mobile hot spots you can buy. That's why putting a local data sim in the iPad can be a good solution for mobile data in other countries.Ah ok. I personally think the cellular models are a ripoff. An extra $150? I just use the hotspot from my iPhone if I need to use data on the go and I have unlimited. Saves me $150!
Needless to say, the use cases are rather limited and if you don't benefit of any of them (most people won't) the cellular is waste of money.