WOW! A net browser incorporated in LW? And what makes you think that this wouldn't consume just as much cpu? (Don't know. Could be...)
Anyways, that would be a whole lot of work, to make a good browser. And if the Lw devs (somehow) decide to go for it, .... Me thinks that either the price of Lw will increase significantly (for the Pro, if they decide to keep the Basic), or they'd have to recruit an entire dev department dedicated to the browser, because LW is written in Java and browsers (from what I understand) aren't. Plus, in order to keep the cross-platform nature of LW, they'd have to make different versions of the browser too... And I've seen how different a browser can be from PC to Mac (IE).

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-