Ron,
I agree. Maybe HP feels this will direct users to their own media, which no doubt will be available in these sizes. The art community and it's suppliers have moved to 44" and I doubt their enthusiasm in moving back to 42". This move may well backfire on HP, at least in this market.
The 60" machine will be welcomed in some circles and I believe Epson will also enter this field, so there is an element of pre-emption here. Personally I have some demand for 60", but I dread handling the media. Canvas would be OK, but paper, providing a suitable range becomes available, would be very difficult to handle. A 44" x 88" print is hard enough.
The immediate question will be if HP has addressed problems cited on other threads that have emerged with extant printers presumably based on the same technology and inkset.
Cheers,
Brian.
www.pharoseditions.com.au