I've just bought a Xerox Workcenter 6025, (colour laser printer copier scanner combo.)
I did a pretty "detailed" analysis of what my requirements were, what I wanted and what I'd put up with.
To find the cost per page, you must decide how many pages you want to average over, and include that in the costs, most printers come with half sized (standard) cartridge/toner as new. In the case of that HP printer, (which I didn't even look at) the cost per page is roughly the same as the cheapest multifunction laser printer I found.
Cost of unit, sure that HP printer linked can do a cheap cost per page.
but at £320 for the printer, and £60 per cartridge, (sure that's 9000 black pages and 6000 colour) but at £200 a time to replace all four I'd expect nothing less! (if you buy regular capacity its £30 for 3000 pages) (which is the same as my laser printer)
whilst my work centre only get 1500 colour pages and 3000 black, I can replace a whole set of them for £55, so price per page is the same. and the printer only cost £130 (~£200 less!)
For the first 10,500 pages (starter + 1 replacement) the HP costs
£320 (printer cost includes~1500 capacity cartridge) + £60 (9000 page XL cartridge) (£380 (3.6 pence per page ink cost)
Xerox cost £120 (+1500 black) + 3X replacement cartridges (£30) is £210 for 10500 pages (2 pence per page) just over half the cost. (certainly not double the cost that HP claim!)
Sure, if you print 4200 pages a month for 1 year (50400 pages) (the absolute maximum of this printer)
then you'll break even eventually. (looking at slightly less than that.)
£320 (1500) +5 * £60 (45,000) (46,500 sheets) (total cost £320 + £300 = £620 (1.29) pence per page)
120 (1500) + 15 * £30 (3000) (46,500 sheets) (total cost £120 + 450) = £570 (1.22 pence per page) (so the cheapest multifunction colour laser printer is still beating the HP by £50 and an extra ream of paper. (after a year printing flat out!) - colour of the small laser is a bit more expensive, but this post is already getting long!
Of course, most people will never in their lifetime print through 93 reams of paper!
so really whilst the HP inkjet is certainly getting towards what lasers can offer, it's not there yet... (damned impressive though...)
(note that in the spreadsheet I made I only compared 4000 pages, as I'd not expect to exceed that in my lifetime. - because I rarely print anything!)
(that's comparing HP to Xerox) feature wise they are almost the same, with wifi scanners 1200x1200 resolution etc)
The biggest thing that pushed me towards laser over inkjet was the cost of ink with my printing patterns, which is usually I never want to print anything unless I want to print something right now, but the ink is all dried up,
So whilst my old inkjet used to have £15 cartridges that said they lasted 300 pages, since I wasn't printing all the time it was more like a £15 cartridge that lasted 20 pages/cleaning cycles. or less.
Then, (on top of that) there is the added benefit that the ink won't run if my page gets wet!
At an average print "duty" of about 10 - 20 pages a year (most) I'll still be on the original toner when I die! but I'll have had to buy an ink cartridge (or four with all the colours) every year (or more).
The initial investment of laserjet, over inkjet if you're at the cheap of of the market is huge, (you can pick up a cheap inkjet multifunction for £20, multifunction lasers start at £120. once you start to get to the more industrial sized devices they begin to level out.
just remember that HP is an ink company with a sideline selling printers!