Of course, that's assuming everything goes to plan, and the Beatles' back catalogue is released on iTunes on June 1st, the 40th anniversary of the release of Sergeant Pepper's Lonely Hearts Club Band, which seems likely now that both the Apple/Apple Records and back-royalties disputes have been settled once and for all.
Downloaded singles now outsell real ones by more than four to one in the UK , meaning that the chart has been almost entirely dominated by downloads since they were added to the chart on the 1st of January - all you have to do is compare the singles chart to the download chart to see that, er, they're pretty much the same.
But the big unintended consequence of the change is that the record companies can no longer forcibly delete - stop selling - a single, at least not without giving up its [legal] Internet sales forevermore. This means that if a band is popular enough, there's no limit to how many songs they can have in the chart. This weekend, it looks like every track from the Arctic Monkeys' new album Favourite Worst Nightmare  will make the top 200, maybe the top 75 - or maybe higher. This isn't because they're the most incredibly excellent band ever, but because there is simply no longer any way of deciding which songs will be in contention .
Look at Gnarls Barkley's Crazy ("Does that make me craaaaazy? I think you're craaa-aaa-zy. Maybe I'm craaa-aa-aaa-zy", and so on for months on end). That damn song spent nine weeks at number one, from 2nd April 2006 to 29th May. The only reason it left the chart is that it was pulled from sale: "We want people to remember the song fondly and not get sick of it. So, from Monday we will be deleting it."
After the rule change at the start of 2007, Crazy made it back into the chart, at number 30, and stuck around in the top 75 until 24th February. Without the blunt tool of deletion, the song would have done a Wet Wet Wet last year, and then some. It had survived in this alternate-universe top 40 for a full eight months - and only dropped 29 places! For added horror, consider that deletion was also the only reason Love is All Around finally dropped out after fifteen weeks at the top.
Since the Beatles' songs are some of the most popular in history, it's impossible to guess how long the Beatles could spend dominating our charts - it could be months, or even years. Bookies William Hill are offering 10/1 odds on an all-Beatles top ten before the end of the year, and pretty short odds of 5/2 on the number one being Hey Jude. "Na na na na-na-na naaaaaa, na-na-na naaaa, hey Jude...", and repeat for a year or so.
Adding downloads to the chart has done a lot to bring them in line with reality. Bands have started entering at the bottom and working their way up like they used to in the old days, instead of the number-one-or-bust mentality of recent years. But when a few mega-bands, new or old, can take over the chart, it's surely going to get really old, really fast.
 Don't shed any tears for the record companies - they were losing money on physical singles, with the only real reason for releases being either to promote an album or for prestige. Now that the market has moved to downloads, they're coining it in.
 Incidentally, it really is a good album. Seriously. Go get it from BitTorrent or something, you'll see.
 ZOMG LONG TAIL