Way I see it it's a good buy if you want something now...
There are things that I know are coming but are probably not until early to mid next year and these are...
300+ DPI screen (much brighter and more battery efficient too!)
Quad Cores with a decent GPU included (Tegra 2 GPU is meh)
I love the slim and lightness of the 10.1
I wont get another tablet until it has those features and is equally as light and thin and I know there wont be anything coming out this year that ticks all those boxes.
Also Galaxy Tab is unlocked and was the official Google dev tablet so you know you're going to get good support here on XDA