A lot of the improvements which make 2-in-1's useful rather than mediocre are incremental. Just as both the smartphone and tablet concepts for years before hard

A lot of the improvements which make 2-in-1's useful rather than mediocre are incremental. Just as both the smartphone and tablet concepts for years before hardware existed which could make it work well. I'd say the two major hardware barriers up to this point have been i) having a fast processor which is also efficient enough to operate within a small thermal envelope, and have a decent battery life, ii) keeping the weight down so that the device is comfortable to read from. We've just got to the point where you can get desktop-class processors that fit within the thermal envelope, in devices which are 700g. Now it's just about software.