Yeah, it is four GB. This isn't a new OS. This is just an update or an add-on to Snow Leopard.
That's patently false. The reason it's 4GB is probably all of the following :
- No Rosetta, so no fat binaries for every library on the system (PPC + Intel)
- No multi-lingual support (you'll get whatever your Mac App Store preferences makes you get as far as languages go).
- No printer drivers (they'll just download themselves).
- No more free Xcode, and it sure ain't included in the download.
Arch Linux fits under 1 GB with a full X environnement. There's no reason Apple can't fit OS X in 4 GB. Now, their download method is anything but convenient (HP-UX I can get on .iso's from HP's site. Same for Solaris. Same for any Linux stuff, which is also available as a "netinstaller" too if you want that). Apple is late to the "download your OS!" game in the Unix world and they've managed to make it confusing as it stands.
The price sure is right, except there's the hanging question of family packs. Me and my GF don't share an iTunes ID. Do we both have to pay ? Do I have to log in with mine on her computer ? Can I copy the files over ? Convoluted and confusing.
Let's hope the "Upgrade on day One" comment has value and that they just plan on shipping Lion through the Mac App Store earlier than the DVD release to stores. I'll just wait for the physical media version if that is the case.
Plus I don't want to waste 4 GB on a recovery partition. What a useless feature.