There is a very thorough review of the rugged Panasonic ToughBook FZ-G1 over at RuggedPCReview.com. While reading through, the following image really stood out:

Consumer tablet screens have come a long way since the early days of iPad. Most manufacturers have adopted direct bonding, wide viewing IPS and higher brightness displays.

As you can see, they still lag a long way behind rugged tablets for outdoor viewing.

We don’t expect that to ever change since consumer tablets are made to look like shiny when on the shelf in the store. That same shiny, glossy display that makes you want to buy the tablet completely destroys its usability outdoors.

Unfortunately putting a ruggedized case around the consumer tablet with a Perspex screen protector only makes matters worse for screen viewing. As you can see, for field tablet users iPads might be cheap, but they are a massive compromise  – and that’s just fine if you don’t care about productivity!

From the Rugged PC Review article:

With the Toughpad G1, Panasonic offers what one might call a "new-era" rugged Windows tablet in the 10-inch class. The G1 is as svelte and sleek and light as it could possibly be while still providing the toughness and ruggedness Panasonic mobile computers are known for. – Dr Conrad H. Blickenstorfer, Rugged PC Review