Necessary if you move a lot of data. If not, the cheaper alternative is to use host-host with certs kept on a USB key. Realistically, if they really want the equations to move faster, they will need more processing and memory put on the device.
FIPS140-2 protocols and ciphers will likely be the norm on these devices. One thing to remember about FIPS 140-2 encryption, is that they only show what is usable by the US Government for top secret and below. For information above top secret, encryption is governed by a different set of publications.
Meaning, state sponsored intel agencies can likely crack the encryption within several months.
When it comes down to it, the easiest way to get past encryption is to get on the box itself. You can put millions of dollars into encryption, but if you click the wrong thing on the Internet... it doesn't matter.
So as an individual, if you really can't wait to shell out the money for this device... you likely haven't done a proper risk assessment, or you have more pride than brains.