... but Silk is being rolled out on a WiFi-only tablet. Most users won't ever have to worry about a crappy cell data connection.
Some day, sure, they'll ship with 3G connections. But client hardware on future devices will only be faster and more capable.
A SPDY-link to Amazon's private caching/compression network is a great win and differentiator. But why even open the can of worms that is two-tier _processing_?
If they're leaving flash enabled on Silk, surely that dual-core chip is capable of keeping up with the bulk of browser rendering and js tasks.
It's true this problem is also being solved by LTE rollouts but those aren't today for most people.