[SIZE=2]That's the nature of buying electronics-eventually there's always bigger and better.
I wouldn't worry about PS3 yet-that's still several years down the road.I wouldn't worry about stuff getting out of date-as with the PS2,backward-compatibility will no doubt be a feature.
As to if the hard drive and network adaptor will be worth the money,that's hard to say yet until we see more information on the services provided to those that do decide to buy it.[/SIZE]