The lack of DVD support is largely a non-issue. OEMs have often shipped Vista/7 PCs with third-party DVD software (even though these versions have built-in DVD playback), and this trend will no doubt continue with Windows 8.
The wording of the FAQ indicates that installing third-party DVD software won't expose the codecs to Windows Media Player (as in past versions), meaning you would have to use a third-party player, but that's not the end of the world either.
Like with all Windows version, they won't be worth switching to until at least the first service pack
This was very true for XP, and true for Vista to a lesser extent, but it is completely untrue for Windows 7; Windows 7's SP1 delivered hardly any new fixes
that hadn't already been issued as a Windows Update. It was by no means a must-have upgrade.
Windows 8 continues the overhauled development process established with Windows 7. As with Windows 7's beta, Windows 8's Consumer Preview is already stable and compatible enough for everyday use (including gaming).
Even in its incomplete state Windows 8 has surpassed Windows 7 SP1 in raw performance; start up and shut down are noticeably faster on the same hardware, and memory use has been further optimised. It's probably not a big enough difference to justify the cost of upgrading for many, but for those wanting the absolute best Windows version Windows 8 is where it's at, Metro or no Metro.