Then that is good news. I've never owned any of their products, but if their batteries do indeed still hold a good charge say five years down the road then I won't really care if I can change it since there'll likely be a new model I'd want by then anyhow.
So now the only concern that remains is the speed. I'd be using for internet/email 100% of the time, so I'm hopeful that it is actually faster than what I saw in the demo.