Is the ipad just a larger ipod touch? How about the Ipad Pro?
First, I don't understand your thread title at all. What do you mean is an iPad worth the upgrade over an iPod touch? They are Entirely two different devices.
What Exactly do you want to know about the iPad Pro?
If you're comparing the iPad to the iPod, they're completely two different devices, even though they have similar fashions with the user interface.
There are tasks that you're not able to complete on your iPod that you would be able to on your iPad.
Basically, iOS in current form on an iPad is a bloated version of iPhone OS.
They looks like different and have different usage cases. However, what you can do most on iPod may be able to finish faster on iPad, or cannot finish at all depending on app support, and vise versa.
For example, if one app does not officially support iPad, then you may not be able to use that app on iPad. On the other hand, you can use some drawing app on your iPod but those apps work a lot better on an iPad. Microsoft office apps work better on iPad than on iPod.
But still, iOS on iPad is mainly just a bloated version of iPhone OS.
Well , answering your question , The Ipad Air 2 and Ipad Pro is a HUGE upgrade over the Ipod Touch 4 gen. Even the Air 1 ,IMO is a HUGE upgrade over the Touch 4.Is the ipad just a larger ipod touch? How about the Ipad Pro?