Sure I do. Samsung Galaxy 8.9 ad 10.1 look like much better tablets. Even XOOM is better than iPad in many respects.
Better to who and in what respects? The average consumer does not care about specs, they care about the experience, and reliability of the device. The devices you listed may be better on paper, but how does that translate to the consumer? More apps? Faster Apps? Better sync? More music or videos? How about games? There is more to be the premier tablet then the specs on paper. The IPad is number one for good reason, they have figured out most if not all the angles, and they have upgraded the product line to keep an interest.
The competitors are great for IPad users, It keeps Apple moving forward, but to be honest they do a pretty good job of moving themselves forward. Before the IPAD there was no Tablet market. The IPAD has taken over the e-reader market (In on day of sales). Would Apple continue to innovate without the competition, history says yes.
The other tablets may make a different product that specs out better, but if the general public is not interested then it is all for not. If the other tablets are going to be serious competitors, they need to meet Apple on common ground, it the user experience that counts.
Apple has laid the ground work with Magazine companies, Book publishers, Movie studios, and TV networks. They are the premier Multimedia devices.
Android has potential, but it is not in the same class as of yet.
And for all the Android lovers out there I have an Android phone, I use it every day, It has serious issues and the user experience does not even come close to even my original Apple IPOD Touch from 4 years ago. Apple has been dominating the Touch screen device market for years, they have years of experience and apps. They have had the time to listen to the user base, and develop robust interfaces. Can Android get there, of course they can, but it is going to take time.