So if Sony came out with a 'netbook' with a killer processor and a really high price it would be in the same category?
there is one, the sony x11/x13. 11'' screen, atom cpu, ssd, >$1400. and it is very thin, thinner than the actual macbook air. yes, there is a premium market.
i work since some years only with an 11'' notebook, i bought an 13'' macbook pro and it was too big for me. i will never buy such a big notebook. websites are no problem, you only need a display with a good resolution. for example the 11'' screen of the sony x13 has 1.366 x 768 px, better than the 13'' macbook pro / air.
i don't believe in esata on a mac. i think it could only be a sim card or an sd-slot is.
an sepcial ethernet slot would also be cool. ... but not sure.