I don't see inclusion of 4G on any tablet devices as a plus. It drives up the cost slightly more and it has never really made sense for each device to have their own cellular connection.

Most people who buy tablets are likely to have a smartphone so it would seem more appropriate to have tethering and use that one connection for multiple devices.

I realize that's a personal choice, but I currently own an iPad 2, Kindle Fire, 2 Kindle Touches, and I just bought the Nexus 7. I'd rather pay for one connection and tether all those devices to that connection than each one have their own.