I'm a homebody so I'm not as mobile as most, but it would be nice to travel even for a weekend or even a day at a coffeehouse and be able to bring the laptop and check emails and know they are also on the desktop synchronized.
That is exactly what IMAP is all about
I guess ones just has to adjust to the new look/ feel of it like everything else.
I'm not sure what you mean by a different look and feel. I use Apple Mail and the only difference I see is the mailboxes are not under
On My Mac, but under the specific Account. Where I have run into differences is how to get mail to appear in different sub mailboxes. For example with MobileMe you just create the Mailbox and a rule to handle the routing. GMail IMAP is something of a world of its own. You have to create the Sub Mailboxes and setup the routing to them on-line in Google Mail but then they will show up in Apple Mail. If you have any questions about this check back here.
Currently, when I travel for 5 days, I copy over the whole identity to my laptop of Entourage. Hopefully I wont have to do that anymore.
Yep that will be a thing of the past.
NOTE: Not all email hosts support IMAP. Neither of the ISPs I have used here, AT&T and Comcast, do which is why I route their traffic through a GMail account.