PC and Tablet Markets are Distinct, Even if We Don't Track Them That Way
PCs are for work, tablets appear to be for mostly everything else. A survey by IDC suggests that only 8.7 percent of tablet buyers want to use the tablet as a replacement for their laptops.
The IDC study also found that 58.5 percent of respondents bought a tablet to use in addition to a laptop, and not as a replacement.
Those findings also suggest that as many as 90 percent of buyers acquire tablets for reasons having little to do directly with PCs. In other words, people are buying tablets like they buy smart phones and MP3 players--to use for intrinsic reasons--and not as a substitute for a PC.
Despite that, we probably will continue to see tablets tracked as part of the PC market.