Of course I love the extra competition for Apple, and while they have done a good jump with improving great devices its because in these large markets, even if they have a great device, there is room to grow, so updating hardware/software often serves to sell more devices.
I'm excited to see what HP has to offer with WebOS, because IMO thats on of the best mobile OSes. I'm so impressed with Google's efforts with Android 3.0. They clearly understand they need to bring their A game for tables(simply porting Android to smartphone wasn't enough). I'm also excited to see what MS brings with Windows 8. I think there is a market for Windows on tablets, at least in some places, but the ability of hardware makers to use Intel chips sorta force the tablets to be larger then is ideal. ARM support is one of their better moves as far as I can tell(although supporting x86 and ARM will be difficult, I'm excited to see how well they do it)