other than winfs & virtual folder search, you can make xp look and act like vista using some 3rd party apps.
1> Longhorn transformation pack 10.5 free - all the wallpapers,themes,icons..etc found in vista
2> Dreamrender 2.19 shareware- uses graphics cards instead of cpu, a replacement for avalon - create/download 3d animated wallpaper/use videos,liquid effects for wallpaper/transparency..etc
3> Desktop X shareware - another simliar replacement for the avalon feature- 3d icons, wierd start bars and menus, apple icons/animated icons lots of stuff dedicated to eyecandy
4> Google desktop/coppernick/findfiles-free - of course these search utilities are not virtual folders like how vista's search works, these find whats on your drive pretty fast anyway.
5> Truelaunch bar -shareware-you can create virtual folders,combine shortcuts in groups..etc, replaces old quicklaunch
6> WinFX - shareware- different effects for menus
7> Armor tools/pcsecure/securexp...etc - replacements for vista's user account protection (which will be quickly hacked and taken advantage of)
heres a list of some features that i think many enthusiasts will at some point find them to be resource hogs,not applicable to user or eventually replaced by 3rd party software.
support for tablet pc's (wow..tablets)
broad IPv6 support,
improved client-side caching of data stored on a server,
whole-volume encryption... (i have a 2 yr old prog that does that)
a revamped synchronization engine....(ooo..revamped)
the ability to support laptops with an auxiliary display
automatic hard drive optimization and a secure boot-up process (i think diskeeper and bootloc already does that)
more outlook security features (do people use this crappy thing whith all the alternatives out there?)
user account protection- (something else to hog resources)
security features for corporate,roaming and mobile environments (cripes theres already a virus for it and why would home users need those extra securities, more resource hogging crap with countless patches that will be needed within a year)
service hardening monitors critical services for abnormal activity (great if your a paranoid antivirus freak but more monitoring, just what we need)
IE7 (nuff said, many will still want firefox)
Network access protection ( everyone will have to use an AV anyway..why bother with this crap)
Winsat- best for gaming noobs, no way it can be entirely accurate.
Firewall with incomming & outgoing protection ( no one will trust this or it will be exploited anyway and use 3rd party firewalls)
A.C.T (most users will still not know how to use this and request help or pay someone anyway)
faster bootup/sleep and better memory management ( great but is that worth $300)
U.I. (avalon) glass and new window animiation ( will get boring quick and you can have all that on XP that also uses your video card instead of cpu)
Virtual Folder (great but again one of few features of any real interest)
winfs (nice but dont expect miracles in performance)
Network projection for mobile pc's (i'm pretty sure theres software on xp for this)
indigo (i'm not impressed nor would i expect to see this utilized to full potential anytime soon after release)
who cares what the specs requirements for vista are, if you cant match it then likely you dont need it. also you have to remember that vista has to last till 2012...the min requirements will be quite standard long before then. and if they didnt upgrade technology...which requires higher specs...then whats the Fn point of making new os's?