100-Year Domain Renewals?

Ryosen writes "I received an email this morning from Network Solutions. Seems they are offering their current customers the ability to renew their domain names for 100 years. Is this is a realistic investment considering most companies don't last 100 years? Given that the Internet is a recent phenomenom, is it realistic to expect it to be the same in 100 years? Will Verisign be around that long? Does this make sense?"