Indeed. But ultra portable approaches the mobile space. I suppose with the meteoric rise of celltop and ultra portables, it should be a more prominent issue. It's interesting to think that the average pixel count might actually decrease.

My celltop has zoom but the best sites just have another version for it.

2007 was the first year that more laptops than desktops were sold. If you consider browser enabled cellphones, I wonder how those numbers change.