Tablets aren't new, they've been around for ten years. No one really cared about them then and no one really cares about them now. Netbooks, on the other hand, have been around for only a few years and they are really growing.
I think you wanted to say: "I`m absolutly with you, mate". But it sounds like "I don`t agree with you anymore."
Superku's right. "I couldn't agree with you more!" is actually a commonly used English phrase which means "Absolutely right."
