My dad went and got a Verizon hotspot for himself for Christmas. It's pretty need*. It connects over 4G. It works. It even works in my studio (I "borrowed" the hub from him for "scientific reasons"). Thing that it's not is fast.
The service we complain about all the time (the DSL here) is much faster:
The reason my dad got this thing is because he was frustrated with getting access for his iPad whenever he was travelling. Which, you know, for dad that's a pretty impressive technological jump.
The downside of these 4G hotspots are the data limits. I feel fairly confident I go through more than the normal users data usage a month.
But presuming and actually knowing are two different things. So I've downloaded a bandwidth monitor just to find out.
*"Need" is the word the kids are using these days for "neat". Don't look it up. Just trust me on that one.