Touchscreen DMM Development Board
This would be doable with current technology with ease but a (or perhaps the) key question is "what is the market demand?". While it would definitely be useful for some people, how many is "some" compared to total market? You may be able to find a lucrative niche. Or not.

Not too many manufacturers are liable to want to enable the unskilled in this way - or get them dangerously involved - when there are service people making a living from it already. 

An alternative to this is an eg USB interfaced meter (or Bluetooth etc) and a smart Pad/Phone  or a PC. The cost of doing this in small volumes would almost certainly be hard put to justify compared to an Android application or similar. In most cases you would not even need a meter interface - you "just" follow the instructions and key in the results. Certainly a lot more certainty would be possible with a connection to the meter if inexperienced or unskilled people were using this - but they are not a good target group for letting loose in this arena regardless of the tools available.