The original Asus Transformer TF101 was one of the best of the initial Honeycomb tablets, although it wasn't as polished and thin as the Galaxy Tab 10.1. It was also $100 cheaper, selling for only $400, and with specs and display quality just as good as any other $500 tablet.
The Asus Transformer TF101 got the ICS upgrade quickly earlier on this year, ahead of many other devices on the market. That was possible because the code base for ICS was not much different than the one for Honeycomb, compared to the one for Gingerbread. It might also be due to the fact Asus and Nvidia worked hard to bring ICS to their devices, which is one of the reasons why Asus is now one of the most loved Android manufacturers.
The ICS upgrade brought a big improvement to the Asus Transformer TF101, especially since the Tegra 2 was not a great chip to begin with, that would compensate for Honeycomb's own software flaws. Although earlier rumors said the Asus Transformer TF101 would not get the Android 4.1 Jelly Bean upgrade, it seems that it will, according to an Asus official from Germany. Both the TF101 and the Slider SL1 will get the Android 4.1 upgrade, as well as all the newer Asus tablets.
The Jelly Bean upgrade should be an even bigger boost in performance than ICS was for the Asus Transformer TF101, and if there was one last upgrade that the device should receive, it should be this one.