If you deal with sheet goods a lot, there is no doubt in my mind that the Festool TS55/75 and guide rails are better than the table saw. As the Festool videos say, why wrestle 100 lbs through the saw when you can slide the saw instead? In addition, I have the odd situation that I can't fit a whole sheet through the stairs to my shop :-\. Previously, I would rough rip the sheets in the garage with an ordinary circular saw and then recut them in the shop with the table saw. With the TS55, the first cuts are final cuts ;D.
In addition, there are certain kinds of cuts that are dangerous to nearly impossible on the table saw but are easy with the TS and guide rails. Long tapered rips are one example. I've never liked doing long miter bevels on the table saw, regardless of right or left tilt. The TS feels safer to me.
I don't own an MFT and I've used table saws for so long that my thought processes are probably pretty locked-in, but there are some other cuts that are so fast/easy/safe on the table saw that I can't imagine giving mine up. This is especially true of multiple cuts that all need to be exactly the same. On the table saw, you set a fence or stop once and then just handle each board once. I do a lot of rips for rails and stiles, and you can't beat the table saw's "set the fence once and just shove the boards through". With the TS you handle multiple things multiple times: put the next board on your table, put the guide rails on top of the board, make sure your jig has them aligned properly, pick up the saw, make the cut, remove the saw, remove the rails. If you are cutting narrow stock, add steps for handling the extra support pieces that keep the rail in place. Also, despite the various jigs and techniques discussed in a lot of places, I find that the TS feels clumsy and unsafe for cutting small pieces. Finally, I greatly prefer the table saw with a dado blade for dados/rabbets/tenons. Again, fewer steps to set up and use accurately than any router rig I ever tried.
So, for me the bottom line is that each has its place and I would not part with either.
By the way, I also have a 16 inch bandsaw. It definitely has its place, especially for resawing, curves, and very thick stock, which I do a lot. But I would not substitute it for the table saw either. YMMV, but I've never seen a bandsaw the produced a cut as smooth as either a TS or a table saw, so you always have an extra step of cleaning up. Plus, due to blade drift it is tedious to set up a band saw to do a smooth accurate rip cut. The stock table on a bandsaw is small compared to a table saw, so you frequently need supports for long boards, adding another setup step. The throat sets an absolute limit on the length you can cut.