What @Annski said! The only real prediction that anyone can give you is that you will probably, on the law of averages, live longer if you embark on some treatment program. As Rikki explained, the ''generation' thing reflects progression in the drugs we are given.
Now, before anyone gets stressed because they have been recommended an early generation treatment, a scientist mate of mine gave me a good anology which may help explain this. Car companies are constantly coming up with new models. They may be more comfortable and have fancy names, but the reality is their purpose has remained the same. Getting us from point A to point B. All the safety features in the world can not guarantee you won't have an accident and they are harder to fix when they break down. Sometimes an older model is more reliable and a better option, depending on the road you are travelling. Mxx